The ginormous party warehouse at 1015 Folsom Street has three levels of dance floors that make for an extensive variety of dancing venues -- complete with a 20- and 30-something gyrating mass who live for the DJs' pounding house, disco, and acid-jazz music matched to a full-color laser system. Each night is a different club that attracts its own crowd, ranging from yuppie to hip-hop. Open Thursday through Saturday 10pm to 2am.