Halloween Booootie

A dozen DJs take over four rooms at DNA Lounge, playing bootleg mash-ups that blend house, electro, funk, post-punk, indie and pop. At 11pm, live mash-up rock band Smash-Up Derby and Hubbaa Hubba Revue together lay down a Halloween-themed set—in costume, of course—and at midnight, dancers from the Bay Area Flash Mob show off their freakiest moves. First prize in the costume contest wins $200.