"House rule: You puke, you clean." Okay, that about sums up the Double Down. Well, no, it doesn't really do the place justice. This is a big local hangout, with management quoting an old Scope magazine description of its clientele: "Hipsters, blue collars, the well-heeled lunatic fringe." Rumored to have been spotted here: director Tim Burton and Dr. Timothy Leary. Need to know more? Okay, trippy hallucinogenic graffiti covers the walls, the ceiling, the tables, and possibly you if you sit there long enough. Decor includes Abby Rents-type chairs, thrift-store battered armchairs and sofa, a couple of pool tables, and a jukebox that holds everything from the Germs and Frank Zappa to Link Wray, Dick Dale, and the Rev. Horton Heat. On Wednesday night, they have a live blues band, while other nights might find local alternative, punk, or ska groups performing. On some Sundays, the Blue Man Group plays, but under another name, as a percussion band. Call about that, for sure. There's no cover unless they have some out-of-town band that actually has a label deal.