Good tips all around so far. Aria is usually our home base, too. Every trip we get at least one slice of the Forager pizza at Five 50 (mushroom, bacon, ricotta, white sauce). I'm craving one right now! The buffet is pretty good, but Wicked Spoon at Cosmo beats it. The espresso martini I had at the Alibi lounge was the best I've ever had. The "shortcut" to Cosmo (option 2, above) is very convenient, but do be careful when you cross the lanes of traffic in the Cosmo parking ramp. The sight lines aren't good (for drivers or pedestrians) and people aren't looking for pedestrians.