CMJ Music Marathon. Whoa. This is one of those shows everyone wants to go to and—surprise!—it's in a tiny venue. Still, if you arrive early you'll catch some terrific openers including bouncy indie-rockers Tony Castles, soft-rocking groovers Acrylics, delicate beatmeisters L'Altra and TONY-tipped coed Brooklyn duo Buke and Gass with its hectic, hooky brand of art punk. Phew!