My wife and I went to Vegas on a Monday through Wednesday. There weren't that many shows going on during those days. We went to tix 4 tonight to see what was available. I once saw Mac King on Pen & Teller's Fool Us and REALLY enjoyed his act, and was pleasantly surprised that he had an available show. We bought tickets, which were SUPER CHEAP and uber'd it to the casino.
You will not regret watching this show. Mac King is excellent! He's genuinely funny, great tricks, and great magic. There's also a good amount of interaction with his audience. I honestly have no idea how he did some of his tricks. I just sat there with my jaws open scratching my head. You'll have to watch his show to find out. The best thing about his show, is that it's one of the cheapest ones you can get, with great production value!
If you're in Vegas, and you enjoy comedy magic, I HIGHLY RECOMMEND the Mac King show.