Sorry, it's actually called tix 4 tonight. They have four locations in Las Vegas so you should be able to get to one of them without too much hassle.
We, us and our friends, have had great luck with tickets there. You never know what's available until you get there but you can see some great shows for half price! Last time they had Phantom of the Opera, Mystere, KA, Celine, a couple of the top magicians, Carrot Top and many more. That was last September....your mileage may vary.