I've only been to the Rex theater once, but I really have such a good memory from going there. I went to a concert in middle school down at the REX for my favorite band(still love them) lol The Jonas Brothers....the venue is very small and can't hold a ton of people but it's good for a small event. It's right on Carson street in the South Side. It looks like an old theater to me and it's cool how there is all the flyers stuck on the outside of the REX promoting what's going to be playing there. It's a nice venue!