We had a ball here. Brad Garrett has this theater named for him in the "basement" of the MGM Grand. If you can't place the name, Brad Garrett was Ray Romano's older brother in the TV show, Everybody Loves Raymond.
He doesn't perform every night, but we chose a night he would be there. He is hysterical - very off-color, so be warned and try to stay out of the front row. If you are in the front row, you're a target. He does offer consolation to the folks he abuses at the end by giving them t-shirts and hats from his show.
There were two other comedians that also performed. Both have been on late night TV shows, but he overshadowed them tremendously.
As for the theater, it was very nice. It is not set up like a traditional theater, but more like a night club. There are tables and booths adding more ambiance. The service was wonderful, and the prices were reasonable for being a theater in a hotel. We both enjoyed a couple of drinks (one on the house). We left happy and laughing!