If you had been standing outside the Metro Cafe last fall during the Black Lily sessions, a smorgasbord of raw female talent put together by the Roots, you would have thought the club was overflowing with A&R scouts. Everyone had opinions about who would blow up and who would fade into the shadows. The buzz threatened to drown out the music inside—until the Jazzyfatnastees took the stage. Made up of Tracey Moore and Mercedes Martinez, the duo brought an old-school soul sound marked by true singing ability, not the studio magic tricks of most groups today. That the Jazzys’ headline debut takes place in a dance club is our good fortune. They’ll be in a big venue soon enough, and we’ll all be scrambling for tickets, remembering the early days when they sang hits from their first album, The Once and Future, in a spot so intimate you could hear every whispered note. At 8 p.m. at 2:K:9, 2009 8th St. NW. $16. (202) 575-2009. (Holly Bass)