You don't have to spend hours in the gym to feel at home at this spacious downtown gay and lesbian club. You just have to forgo that early bedtime. The joint starts jumpin' at about 1 a.m. on Saturdays and stays open as an after-hours club until 4 a.m. Clubgoers travel from as far as Detroit, New York, and Atlanta to hear DJ Robbie Rob's hot and unholy dance mix, which includes hip-hop, R&B, reggae, and four varieties of house -- booty shake, tribal, vocal, and gospel. Line dances abound: There's the cha-cha slide, the Cleveland shuffle, and the "shake what yo' mamma gave ya." The thirtyish, working-class crowd keeps it real and looks good doing it, thanks to the second-floor balcony, where clubgoers can scope out the all-shapes-and-sizes merchandise on the dance floor below.