The first Saturday of every month, divey hipster watering hole the Knockout becomes a time machine that transports all those people who were teenagers in the '90s back to their childhood bedrooms. But you can check your angst at the door (just don't forget your flannel before 11 p.m., otherwise you pay $5 cover) because this is a full-out eardrum-busting party where kids who never got the chance to live out their alternative music fantasies (or maybe they did, and never got over it) can bump chests and grind privates to Nirvana, Sonic Youth, Bikini Kill, and, yes, Neutral Milk Hotel. You will be lathered in the sweat of strangers, there will be mosh pits and stage diving, and if you're on the prowl, the throb of sex at this party is palpable, just like it was in high school.