IF YOU'RE here, you obviously didn't come up with seats on the 50 in Jack Murphy Stadium for Superbowl XXII. Well, you can still have a ball with other Redskins fans this Sunday at 5, even if none of your friends is tossing a Superbowl-watching party and you don't have a regular hangout "where everybody knows your name." Festivities are breaking out all over Redskins Country.

For Superbowl XXII, Washington abounds with convivial spots to gather with all sorts of folks as you "root, root, root for the home team" -- even if you happen to be from Denver. What's more, you'll probably hear more astute analysis -- and funnier wisecracks -- from the crowd at the bar than from anyone in the booth.

Special Superbowl events are planned about everywhere -- not only in bars but in hotels, clubs, firehouses and even churches. The following sample of modest and elaborate parties includes a number near Metro stations; the possibility of motorists who have celebrated too much makes the subway an attractive option.

The list is by no means complete; rest assured your own favorite haunt, whether included below or not, will be alive with fans come Sunday. Furthermore, some places usually closed Sundays will be open for the occasion, while others usually open have been taken over for private parties. Wherever you go, get there early if you want a good view. SPORTS RESTAURANTS

Although their famous owners may be in San Diego, restaurants run by past or present Redskins are still the "in" spots this Sunday. They have all the advantages and disadvantages of popular Irish bars on St. Patrick's Day. Even if its proprietor isn't starting, J. Schroeder's at Seven Corners is booked solid for dining, although a few fans may be able to squeeze into the bar. Joe Theismann's three Virginia locations in Alexandria, Vienna and Bailey's Crossroads and Fran O'Brien's in Annapolis should also be well populated.

Jeff Hayes and Curtis Jordan are offering an all-you-can-eat Superbowl Buffet at Rocco's (8242 Sudley Road, Manassas); $4.95 adults, $2.95 children, age 5 and under free). The "Doc" is prescribing a "Fun Brunch" at Rick Walker's Scoreboard (10334 Lee Highway, Fairfax); after viewing the game on 13 color monitors, you can stick around for a party featuring trivia contests, cash prizes and "lots of surprises."

Stars of other sports have caught the Superbowl spirit as well. Real sports gluttons can arrange to show up at Brian Watson's Penalty Box (above Armand's Pizza at 111 King Street, Alexandria) by noon; for $25 they can have a round trip to the Capitals- Flyers hockey game (including pizza buffet and a drink) and still be back in time to view the football game. Hockey star Rod Langway's Sports Club (9500 Annapolis Road, Lanham) will feature special buffet and drink prices.

Champions' two locations (1206 Wisconsin Avenue NW; Rtes. 7 and 29, Falls Church) have a superb collection of sports memorabilia. The Georgetown location will teem with broadcasters. Channel 7 and a Denver station will be doing their pregame shows, while NBC will broadcast live during the game. WAVA radio will be on the spot, giving out "tons and tons" of their Redskin t-shirts, right through the postgame victory party. Fans who squeeze past the cameras will find sausage-and-pepper sandwiches of the kind the Redskins eat each week in the chow line. In Falls Church, a $6.95 all-you-eat buffet from 6 to 9 accompanies an auction of authentic sports memorabilia to benefit Hugs for Kids. Owner Mike O'Harro promises "prizes and surprises and celebrity mystery guests" at both locations. No cover charge, and no reservations accepted.

The Touchdown Club (20th and L NW) opens its Superbowl Party to the public by reservation ($20; 223-1542), with "stadium food" and a cash bar.

If you prefer partying at home, what more appropriate menu could you have while rooting for the Hogs than ribs and tangy North Carolina barbecue cooked up by a true Redskins great? Roy Jefferson's Pit Barbeque, newly located at 6364 Coventry Way, Clinton (868-ROYS), will prepare a feast complete from BBQ chicken breast to "Redskin Potato Salad" for you to pick up or, for a small charge, have delivered. "OLD D.C."

A lot of braves will doubtless follow the warpath to Georgetown on Sunday. In addition to the media activity at Champions, ABC will be shooting the scene at Wisconsin and M from Annie's (upstairs at 3204 M), where the Superbowl Party will be going full blast. F. Scott's (1226 36th Street) will be bringing in TVs for the first time to celebrate the game with a special brunch from 2 to 6 and dinner from 6 to midnight, with Bloody Marys and mimosas priced at $2; similar activities are planned for the young crowd next door at The Tombs. Poseurs (3401 M Street) claims "the largest screen in Georgetown" with a 10-foot set upstairs and a 13-footer downstairs, with no cover charge until after the game. The friendly Superbowl Express at Garrett's Railroad Bar (3003 M Street) will be chugging along in "dollar dogs" and pint drafts; vendors circulating with hot dogs and hot pretzels will create a stadium atmosphere, with peanuts and Redskin headdresses as giveaways.

In Foggy Bottom, you can have free shooters with each 'Skins TD and free hot dogs at the half if you sit at the bar at E.E. Wolensky's (2000 Pennsylvania Avenue NW). The 21st Amendment (2131 Pennsylvania) opens on Sunday only for Redskins games and plays "Hail to the Redskins" and hands out some freebies whenever "the points soar."

Downtown, the Pavilion at the Old Post Office (12th and Pennsylvania NW) and WCXR-FM radio are throwing a bash around a 20-foot TV screen suspended in the huge atrium. Festivities for the whole family, complete with prizes and Redskins giveaways, begin at 4:30, with snacks available from Pavilion vendors.

Duke Zeibert's, where longtime Redskins depreciator Jimmy the Greek did himself in, won't be open this Sunday, but the West End, served by the two Farragut Metro stations, has its share of pigskin festivities. Mister Days (in the alley behind 1144 18th Street NW) is having an "indoor tailgate party" with dogs, burgers and stadium drafts. Chadsey's 21st & M hosts a 3:30 to 6 "tailgate party" with 50-cent drafts, "hog" dogs and "pig" skins; a Superbowl viewing guide and a complimentary "hog" spread during the game lead up to a drawing for a trip to anywhere in the continental United States. The party at The Bottom Line (1716 I Street NW) runs from 2 p.m. to 2 a.m., with two-for-one Corona beers.

The party starts Saturday night at Rumors (19th and M NW) with a Pep Rally to benefit the anti-drug Hugs for Kids program starting at 9 p.m. Sunday's unlimited champagne brunch ($12.95) leads into a tailgate party at 3 p.m. with prices for Olde Heurich beer and rail drinks reduced to $1.25, and complimentary hot dogs. During the game, Heurich will be donating $100 each time the 'Skins score, and Rumors will give 10 percent of the house proceeds, to benefit Children's Hospital.

Above Dupont Circle, Timberlake's (1726 Connecticut Avenue NW) is running a brunch special with reduced prices and grits with every meal, along with a steak dinner special later in the day. The tavern may lose a little of its low-key neighborhood character as the burgundy-and-gold-clad staff dispense peanuts, hotdogs and noisemakers. Bill Timberlake's famous burgers are always available.

The restaurants near Capitol South Metro all should have the game on. To prove that grazing isn't just for broncos, Anton's Loyal Opposition (400 First Street SE) will have a "Super Grazing Buffet" ($18.95) from 4 p.m. through the game. Bullfeathers (410 First Street) will have a beer special and stadium dogs.

Near the Union Station Metro at the Dubliner (4 F Street NW), manager Kiernan McMahon "guarantees a great time for everyone." The Joe Burke Trio will play traditional Irish music for a champagne brunch from 11 to 3 p.m.; large screens with sound wired to the PA system will carry the game, and at halftime McMahon will serve free hot dogs "stadium style -- except they'll be hot!" Next door at The Irish Times (14 F Street), a party honoring veterans of the Tet Offensive in Vietnam in 1968 is scheduled for 7 p.m. Around the corner at 525 New Jersey Avenue, the Sheraton Grand Hotel will give out Redskins hats and buttons in the bar and adjoining lobby, along with some free hors d'ouevres. In addition to the usual potables, cider, nonalcoholic beer and other beverages will be available.

Elsewhere around town, Faces (5626 Georgia Avenue NW) is offering Happy Hour drink prices and a special buffet, with live music after the game. On the Southwest waterfront, Hogate's (Ninth and Maine SW) has a big screen with an $8.95 buffet and special drink prices from 4 p.m. until the half. Nearby RSVP (401 M Street SW) is having a no-cover free buffet, with cash bar and prizes; you can celebrate by dancing to Golden Oldies until 2 a.m. Stetson's (1610 U Street near Adams Morgan) is cooking up a "Doug Williams Chili Bowl" (with free servings for the first twenty customers after 6 p.m.) and $1.50 Miller beer specials. MARYLAND

Right above Bethesda Metro, the burgundy-and-gold-draped atrium of the Hyatt Regency Bethesda (Wisconsin Avenue at Old Georgetown Road) will echo "Hail to the Redskins" as fans enjoy $1.50 drafts and lots of munchies in front of a 10-foot screen. Special souvenir beer mugs, prizes and games add to the fun. The party at Malarkey's (7201 Wisconsin Avenue) starts at 3 p.m., with giveaways and such concoctions as Couch-potato skins, "Manley-handler" burgers, and (for the other guys) "Mile-High" clubs with Broncos Chili. In Gaithersburg, J.J. Muldoon's (16143 Shady Grove Road) will have happy hour prices, giveaways and red and gold shooters each time the Skins score.

In Prince George's, Lasick's College Inn (9128 Baltimore Avenue, College Park) is such a hard-core Redskins bastion that last Sunday it was rerunning Superbowl XXVII on its big screen. The buffet for this week features steamship round and like fare along with heloski, pierogis and other Polish delicacies. If the World War I decor of the 94th Aero Squadron at College Park airport seems an appropriate setting for the football war, you will find $1.50 drafts along with free hot dogs and chili. At the half, Tick Tock Tavern (1820 University Boulevard East, Hyattsville) will have a $6 all-you-can-eat buffet featuring short ribs, potato salad and chicken wings. El Torito (7607 Greenbelt Road, Greenbelt) is dealing out free hot dogs and 99-cent drafts. For a $5 cover charge, The Office (5753 Crain Highway, Upper Marlboro) gives you your first drink and free run of the buffet. Every time the Redskins score -- field goals included! -- drink prices fall to 50 cents.

Pointer Ridge Firehouse (16408 Pointer Ridge Drive, Bowie) will feature a Super Bowl Las Vegas Night, advertising "prizes galore, every hour" along with its buffet. VIRGINIA

Redskins' bars aren't the only places south of the Potomac. Old Town Alexandria abounds with taverns showing the game. Union Street Public House (121 South Union Street) offers a 10-foot screen and a $10 buffet from 5 p.m. until halftime; Carolina barbecue, chicken wings, crab dip, bowtie pasta salad, and Super Bowl Chili are among the features. Wear your Redskins garb and sit in the bleachers at Bullfeathers (112 King Street), where an old-time scoreboard and TVs hooked into the main sound system add to the stadium atmosphere. A roaming hot dog vendor will benefit the Sunshine Foundation, and "Bull Bash" dancing starts after the game.

In Arlington, Quincy's (5444 Columbia Pike) party package ($20, $35 per couple) includes an open buffet, two drink tickets per person, a $100 drawing at the half, and Superbowl favors along with its "10-foot mega-wide screen TV." The Pawnshop (1911 North Ft. Myer Drive, near Rosslyn Metro) requires reservations (522-7400) to eat free hot dogs and peanuts as you watch the game on the big screen. HEARING IMPAIRED?

In the Old Gym building at Gallaudet College (Seventh and Florida NE), hearing-impaired people can enjoy a large-screen TV with close-captioned play-by-play. Five dollars buys all the chili you can eat, and the public is welcome. DENVER FANS?

They can find a safe haven in a Broncos corral at the Powerhouse, 3535 Grace Street, Georgetown. The Colorado State Society welcome all Broncos boosters (nonmembers $5, kids under 12 free) to see the game in a setting of Bronco decor just flown in from Denver. Call Society president Greg Walcher of Sen. Bill Armstrong's office (224-5946) for more information.

Chicago Bar & Grill (1330 19th Street NW), became (perhaps understandably) a kind of Bears headquarters for the Chicago game, then (perversely) a Minnesota bastion when the Redskins played the Vikings. Broncos boosters should be advised that the place has finally learned its lesson and made its way back to the Redskins reservation. You're still welcome to come in and see the game anyway.

Stephen J. Ackerman is a Washington writer who can't decide where to watch the game.