Hand-crafted sophisticated cocktails like the ones served at Hyde Lounge at Bellagio are quickly replacing those unfortunate syrupy libations, but liquid nitrogen cocktails? Now that's cool. The roving nitrogen cart rolls up tableside for an impressive display that's part science, part mixology. The result? A very tasty adult version of ice cream. At Hyde you'll find a splendid collection of both well-made classic and new-school cocktails. The open-air, ultra-hip lounge overlooks the Fountains at Bellagio, a spectacle of over 1,000 fountain nozzles shooting 250 feet in the air in sync with the lounge's music. That's cool, too.