It’s a seven-ring circus Saturday nights when DJs spin house, trance, hip-hop, and ‘80s music in seven separate rooms in Circus’ 40,000-sq-ft warehouse. Crowds swarm the laser-filled dance floors for a multilingual, multi-themed DJ-powered bacchanalia. On Tuesdays it’s boys night for guys who like guys, and next door at gay-slanted Arena, it’s boys night a lot more often.