151 has no sign, just a staircase covered in graffiti leading down to an unmarked entrance. Once inside, you’ll find all the trappings of a sleek seventies rec room—vinyl wraparound couches, amber bead curtains, and glossy mod lamps—and the messily coiffed, sleaze-chic crowd to match. Music ranges from Guns N' Roses to angry girl punk—but never strays far from the irony-laden, hard-rock mainstream.