"We like to say we grew up singing doo-wop on the streets of Bethesda," jokes Diana Quinn of the Dynettes. She and her partners Martha Hull (former Slickee Boys vocalist) and Cherie Garasso (a former Rootette for Root Boy Slim) have been performing together for six years, dressed in ponytails and capri pants, singing songs like "Chapel of Love," "He's So Fine" and "Walking in the Rain" in the spirit of great girl groups like the Shirelles and the Shangri-las. Along with their "sidekicks" the Refrigerettes (their all-male backup band), the girls ("no, we don't mind being referred to that way") have worked hard to re-create the music of the early '60s. This means lots of rehearsal and grueling hours spent shopping for period clothing. "We want to create an atmosphere that we loved when we were growing up," says Quinn, who advises audiences to "bring your twisting clothes."

Joining them at Boscoes in Silver Spring will be Little Red and the Renegades, the Essentials and Ace Smith. This is just one of 15 shows taking place Tuesday night as part of the second annual Crosstown Charity Jam sponsored by the Washington Area Music Association. Other offerings include Kix at the Warner; Tom Principato, Jr. Cline and the Recliners and the Uptown Rhythm Kings at the Roxy; Keter Betts, Ronnie Wells and Dr. Scanlon at Blues Alley; a folk jamboree with the Seldom Scene, Mary Chapin Carpenter and GrazzMattaz at the Birchmere; and the Slickee Boys and Rootboy Slim at the 9:30 club.

Other venues that are part of the WAMA jam are the Ibex, East Side, Copa, d.c. space, Bayou, Alice's/Mr. Henry's, Mr. Earle's and Tucson Cantina. The funds raised from the evening will be divided among 14 local charities.

Most shows start at 8 p.m., but contact individual clubs for information. Cover ranges from $5 to $15 and audiences are asked to bring a food donation to go to Martha's Table.