Mayor Marion Barry took to the airwaves for 90 minutes last night as a guest disc jockey at FM radio station WKYS to help raise money for the District's Special Olympics chapter.

"This is my first time doing this type of thing, but I love it, I really love it," Barry said, sitting behind a microphone next to regular deejay Donnie Simpson.

WKYS spokesman Steve Manuel said Barry enjoyed himself so much that the scheduled one hour spot was stretched an additional 30 minutes.

Barry's appearance, from 5:30 until 7 p.m., was part of the disco radio station's 12-day drive to raise money for the D.C. Special Olympics, a series of athletic events for the city's handicapped children. D.C. Del. Walter E. Fauntroy (D), boxer Sugar Ray Leonard and Washington Redskins players Pete Wysocki and Kenny Houston also have done guest spots.

Manuel said Barry raised $350 in pledges, including $100 pledged in return for a lapel pin.

Apparently comfortable in his newfound role, Barry announced record titles, warned motorists of accidents tying up traffic in the Washington area and gave away $100 as part of the station's bumper sticker contest.

"He seemed to have the gift of gab," said deejay Church Davis.

"It's a lot of fun, but this is serious work," said Barry. "We're here for a very good cause, one I feel strongly about."