For unadulterated, nitty-gritty hip-hop, F6ix is the upscale establishment that lets guests get down and dirty. The basement-level dance club is fixed with a top-notch lighting and sound system that shakes some serious bass. The air underground gets hot as the dancing heats up. There’s no patio and ventilation is poor. Get there before ten and avoid the cover. Otherwise, it’s ten bucks at the door. This mixed and classy crowd would fool most with their surprisingly serious dance moves. downtown’s dirty little secret.