FRIDAY

METALHEADS -- The venerable WUST Radio Music Hall (815 V St. NW) will be the site of a PMRC nightmare this weekend -- heavy metal on Friday and rap on Saturday. Friday the hall hosts the Mid-Atlantic Metal Jam, featuring Northern Virginia's Jimi Sin (metal with a Southern overexposure), Maryland's Rogue's Choir, the all-gal quartet Scarlet O, Liquid Boy (who are relocating from "somewhere" to "somewhere else" -- hope they find the hall), Murder Ink (formed in the nation's homicide capital, they've made a move to Northern Virginia, but still promise to tattoo available eardrums) and Scooter Trash (a band with a big following among Washington's bicycle couriers). The emphasis, we're told, is on high energy sub-thrash, which should go over well with the suburban fans who don't seem to have any problems following metal rails into the city. Hey, it's hard to find halls willing to book the young and the restless! Doors open at 7, and there is beer available to those who can prove they're 21something ($8; 301/949-1122).

RABBIT REDUX -- Hometown rabbit Charles Fleischer (he was the voice of Roger Rabbit in both the movie and the recent White House/ABC Radio series, "Mrs. Bush's Story Time") lets his face reunite with his voice Friday and Saturday at the Comedy Cafe ($12.49; call 202/638-5653).

HARMONIC CONVERGENCE -- Ahmad Nadimi is a French-Persian New Age musician looking to use sound, melody and rhythm "to create balance and harmony in the mind, body and the environment." Nadimi plays keyboards and trumpet (separately, of course), with help from keyboard player Mehrdad Mizani. The 8 p.m. program at the University of Maryland's Tawes Theatre includes nature-inspired pieces titled "Renascence," "Longing," "Prayer of the Dawn," "Cosmic Circle" and "Shepherd" ($8 students, $12 others; 301/314-8587). SATURDAY

IT'S A RAP -- Barely catching its breath, WUST Hall hosts RRRap-O-Mania '90, an extravaganza featuring Eddie E.X.P., Leader One, Natru and 17 other Washington wannabes drawn from the 42 acts who auditioned for the talent show back in August. Of course, there's beat/wordsmiths from the 'burbs, as well, but the emphasis is on Cap-rap, sometimes with R&B or new jack edges, and mostly made by males (only three female groups made the cut). The idea, says organizer Darnessa Johnson, is "to put D.C. on the map" at a time when it's still thought of as go-go intensive. Johnson says most of the performers are between 16 and 25, with several having major-league dreams and others just looking for an entry point into the entertainment business. The show runs from 10 to 2 ($8; 202/882-6506).

JIVE TALKING -- With intricate, high-energy Zulu chorales and even higher-energy dance steps, South Africa's Ladysmith Black Mambazo has been building a fan base here ever since they graced Paul Simon's "Graceland" tour with their infectious "township jive." The new "Two Worlds, One Heart" album includes a gospel collaboration with the Winans and a Zulu funk/rap with George Clinton, but at Kilimanjaro LBM shares the stage, and ancient emotions, with Abdullah Ibrahim (Dollar Brand), the great expatriate pianist and composer ($16; 202/328-3838). SUNDAY

HAMMER HEAD -- Old Hammer is still hurtin' 'em: M.C. Hammer, riding atop the Billboard album charts, adds Virginia to his conquests with a Patriot Center show that should be as visceral and spectacular as his recent Cap Centre show (love that chorus line!), but with a new opening act: En Vogue, the gospelly soul quartet that's hands down favorite for the Best New Artist Grammy ($21.50 plus fee at TicketCenter; call 202/432-0200).

BEAT ME, DADDY -- Allen Ginsberg (he was The Beat) and Jim Carroll, the odd, distanced voices of two very different generations, bring their words to life at the Birchmere Sunday and Monday ($18.50; 703/549-5919). MONDAY

WONDERSTUFF YEARS -- England's much ballyhooed Wonderstuff finally makes it to the 9:30 club, on a bill with Too Much Joy, the Amerindie band that dared to cover the music (so to speak) of 2 Live Crew in a Florida nightclub and promply got arrested, something most Amerindie bands couldn't manage at a new music seminar ($12; 202/393-0930). TUESDAY

STREET SMARTS -- They're not the Stones, but the Exiles on Main Street aren't sticks in the mud, either. Their Birchmere show is essentially a showcase/preview mixing yesterday's great overlooked singer-songwriters with tomorrow's possibly overlooked stars (just a few breaks and they could be overbooked). Coming mostly from Texas (and often winding through L.A.), they include former master Blaster Dave Alvin, country-rock pioneer Steve Young, Jimmy Dale Gilmore and Butch Hancock (whose 1979 album with Joe Ely, "Flatlanders," has just been reissued on Rounder), Katy Moffat, Tom Russell and Greg Tropper. When folk and country sleep together, these are the children ($15; 703/549-5919). WEDNESDAY

SONIC BOOM -- Sonic Youth's new Geffen album, "Goo," is neither good old-fashioned nor medicated, just what Rolling Stone calls "a brilliant, extended essay in refined primitivism that deftly reconciles rock's structural conventions with the band's twin passions for violent tonal elasticity and garage-punk holocaust." We wouldn't have said it better ourselves. The Youth joins forces with Redd Kross (whose new "melodic" album is just out on Capitol) and the Holy Rollers, at the University of Maryland's Ritchie Coliseum ($15; 202/432/0200). THURSDAY

EYES ON EYERMANN -- Multi-reed jazzist Tim Eyermann unveils his second new Mesa/Blue Moon offering, "Outside/Inside," at the Club 101 (in the Old Towne Alexandria Holiday Inn). The album includes fusion covers of tunes by Whitney Houston ("You Give Good Love") and Stevie Wonder as well as a soulful version of Miles Davis's "All Blues." The album will be in stores Oct. 16, a day before Eyermann and East Coast Offering head off on a two-week California tour with new drummer Rod Cross.