I love you, Secret Pizza.
We went on a Sunday for lunch and it was probably very different than 3am on a weekend. We ordered Veggie, Meatball/Pepperoni, and White slices.
I can't even comment on the other two as we were just dying over the White Pizza. We ordered it because we felt like we "should" since it was supposed to be the most popular. It was amazing...a bit oily, but full of garlic and cheese. Loved it. Probably would be even better after a late night of drinking, but a meal right before driving home was pretty good too.
Its a casual place. Sodas served in red solo cups (for $4...). The unmarked, unadvertised part of it is so fun. And if you've been to the Cosmopolitan before you'll be shocked to see where it is. We've sat there and people watched probably 2 or 3 times and never saw the hallway to the restaurant.