WEEKEND NACHOS Though heavy forms go in and out of vogue — and are currently in a bit of an indie resurgence — there’s nothing effete or cute about Weekend Nachos. The Chicago band brings slobbering powerviolence roars, runaway hardcore breakbeats and rattling, downtuned guitars that flirt deliciously with sludge. It’s nakedly aggressive, rage-driven stuff: envision the neophytes running screaming. Yet this decidedly non-metal band’s most recent LP (and Relapse Records debut), Worthless, saw nominal praise from Pitchfork, of all places. Who knew? $6-$8. The Milestone.