Hidden in a tiny hallway in the Cosmopolitan. We stop by here every time we go to Vegas, and they never disappoint. Staff is always friendly and are genuinely happy to see you. Make sure you order by the pie instead of by the slice and it'll save you and your friends some money. The guy at the register told me the wait for a freshly cooked pizza was 45 min, but it came out in 20. Even remembered me by my name. We ordered a pepperoni pizza and it tasted great! Definitely coming back the next time I'm in Vegas!