I'm a big fan of Capriottis. First time I tried it was in Reno, NV.
This is GREAT hangover food. It's healthy, filling and the bread helps soak up the alcohol. ;) But! Be sure to order with with the sweet peppers and not the hot peppers if you are nursing a hangover.
I get the turkey sandwich, which has shredded, fresh, roasted turkey, not that sodium-ladened garbage they sell at the grocery store.
This is my Go To hangover place in Vegas. Enjoy!