Organizers yesterday canceled the 17th Street Community Festival scheduled Sunday and featured on the "Weekend's Best" page of today's preprinted Weekend section. (Published 9/18/87) THE NUMBER FOR INFORMATION ABOUT THE CARIBBEANA FESTIVAL HERE SUNDAY IS 483-2777. IT WAS INCORRECT IN WEEKEND YESTERDAY. (Published 9/19/87)

STREETS OF THE CITY

Two of the livelier corridors of the District -- 17th Street NW and Georgia Avenue -- will become even more so this weekend when they celebrate annual street festivals. A parade will kick off Georgia Avenue's party at 10 Saturday, beginning at Eastern Avenue and strutting south to Barry Place behind the grand marshal, singer Jeffrey Osborne.

After the parade, from 1 to 7, vendors, amusement rides, more entertainment and speakers on the festival's theme, "Say No to Drugs," can be found at the Emery Recreation Center at Missouri Avenue and at the Banneker Recreation Center at Barry Place. Free. 723-5166.

On Sunday, the 17th Street Community Festival will run from noon to 8 between Riggs Place and Q Street. More than 60 stands will sell food, drinks and crafts, and a stage at Q Street will offer flamenco and middle eastern dancers and six different bands. Free. 332-7287.

SKY KINGS

Airfair '87, a celebration of aerial artistry at College Park Airport, the nation's oldest, takes off at 10 Saturday and won't return to earth until after a day of hot-air ballooning, demonstrations of model rockets, aerobatic shows, fly-bys of military, antique and experimental aircraft, entertainment and a parachuting exhibition.

After sunset, the airport will hold a fireworks display and then a concert by Jonathan Edwards. The airport's at 6709 Cpl. Frank Scott Dr. in College Park. Parking's free, but admission is $1 for adults and 50 cents for students; senior citizens get in free. 927-1909. If it rains, the show flies over to Sunday.

If watching Immelmanns isn't thrilling enough, visit Orange County Airport in Virginia where pilots will be competing in spot landings, balloon bursting, formation flying and other tests of aviation skills. The fly-in will begin at 10:30 Sunday. Admission is free. The airport's on Route 20 east of Orange (south of Culpeper). 462-4273.

A FESTIVE AIR

Summer's last weekend is as good excuse as any to hold a festival. Here are the best:

Olde Towne Gaithersburg holds its sixth annual festival from 11 to 5 Sunday with music, train rides, a Civil War encampment, a carnival, flea markets, food and more. The music begins at noon in front of city hall. You can park at the Gaithersburg High, Junior High and Elementary schools, off Route 355 south of the town, and walk from there or, better yet, take I-270 to Route 124 east to Lakeforest Mall and take a free shuttle bus.

More than 250 artists and craftspeople will be displaying and selling their wares at the seventh annual Virginia Crafts Festival at the Prince William County Fairgrounds in Manassas. The festival's open noon to 6 Friday, 10 to 6 Saturday and Sunday. Admission is $4, children under 12 free. The fairgrounds are on Route 234 just south of Manassas. Take I-66 from the Beltway to Route 234 south. Follow 234 for 7 miles through Manassas to the fairgrounds. 301/540-0900.

The Great Frederick County Fair opens Monday and runs through next Saturday. The hours are 10 to 10; admission is $2, children under 10 free. 301/663-8687.

Caribbeana '87, a festival of art and music to mark the 25th anniversary of the independence of Jamaica and Trinidad/Tobago, opens Saturday with an exhibit of Latin, Haitian and West Indian art and a salsa concert from 2 to 4 Saturday at the Fondo del Sol Visual Arts Center, 2112 R St. NW. On Sunday, six bands will play reggae, salsa and calypso, the Caribbean Heritage dancers will entertain and vendors will sell regional fare from 1 to 7 at Rose Park, 26th and P streets NW. It's all free. 483-2677.

The Anne Arundel County Fair winds up this weekend with the crowning of the fair queen, the baby and talent shows and displays of award-winning art, crafts, food and animals. Hours are 4 to 11 Friday, 8 a.m. to 11 p.m. Saturday and 8 a.m. to 9 p.m. Sunday. The fairgrounds are on Route 178 in Crownsville. Admission is $3 for adults and children 11 and older, $1.50 for senior citizens, $1 for children 6 to 10 and free for children under 6. 301/923-3400.

MONSTER WATCH

The search for Chessie, the legendary Chesapeake Bay sea monster, will be renewed Sunday when the Maryland Watermen's Association takes out the 150-foot schooner Clipper City in pursuit of the beast. Last year's hunt, says organizer and charter captain Paul Foer, discovered "some evidence that we may have seen something like Chessie, or something impersonating her." This year's expedition begins at 3 at the Baltimore Inner Harbor Finger Piers, where Clipper City is docked. Food and drinks will be available on the ship during the three-hour cruise. The cruise costs $21, which includes a tax-deductible $10 donation to the MWA. 301/539-6277.

BIKE NUTS

The Capital City Cycling Celebration rolls off Sunday with the 25-mile Grape Nuts tour of Washington. Registration and breakfast start at 6:30 a.m. Sunday at Carter Barron Amphitheater in Rock Creek Park, and the ride starts at 8. 276-7628. Other events of the 10-day biking bash include races, exhibits on the mall and a commuter contest. For information on these events, call 939-8016.

REST OF THE BEST

The Claude Moore Colonial Farm at Turkey Run will mark the arrival of autumn with an 18th-Century Market Fair from 11 to 4:30 Saturday and Sunday. $2 adults, $1 children 12 and under. 442-7557 . . . R&B singer Shirley Murdock and the Zapp band will perform a free concert from 1 to 6 Sunday in Anacostia Park, 11th and Pennsylvania Avenue SE . . . The Potomac Brass and the Singing Four barbershop quartet will present an evening of song and music at Woodlawn Plantation from 6:45 to 9 Sunday. $5 adults, $2.50 students. Children under 6 free. Woodlawn Plantation is at the intersection of U.S. 1 and Route 235 in Mount Vernon. 780-4000 . . . The 18th annual Croquet Tournament, open to all players over 16, will begin at 10 Sunday on the 17th Street side of the Ellipse. Free. 234-4602.