Secret Pizza it is! All I know is I see tons of people sitting around the middle of a casino with labeless pizza boxes at 2am. After a very brief attempt, my friends and I finally asked and was directed to this random hall that led to the tiny secret pizza place. You can buy by the slice or whole pie. They run efficiently and take your order fast but expect a short line and wait as they reheat your pizza in the oven as it has gotten cold sitting out in display. They have about 4 kinds of pizza, all NY style so very thin crust and slice but very delicious. A little high price for pizza in general, but practically free by Vegas restaurant means.
FYI, there are about 5 bar stools and no where else to sit. It is a true pizza joint, buy your pie and get out.