Crying sky Studios is the best place to go rent a room to jam in. It's probably one of the cheapest, the guy who runs it is a hell-of-a character and his trusty spaniel are always there ready to set you up with the room and gear you need. It's an awesome place to get a bunch of buddies together to rock out for a few hours, or a great place for your band to rehearse. Sometimes I just go there by myself to work on riffs and scream into the mic! big bonus: Close to transit if you're hauling gear!