The Rex Theater is one of the best venues in Pittsburgh for electronic artists. The floor is large enough to accommodate a decent crowd, but they never oversell the events so there is always room to breathe (even if the show sells out). The sound system and lighting are adequate, and the drinks are reasonably priced compared to other "club" venues. Recently, I've seen The Glitch Mob and Designer Drugs. Both shows were a blast. The biggest con is trying to find South Side parking on a Thurs-Sat night.