The other new lounget at Venetian and Palazzo, Rosina is the vintage answer to the more modern Dorsey. High-backed, round booths with curtains that can be drawn makes this spot the more clandestine and intimate of the two, while tones of gold and mauve add to the subdued and relaxed atmosphere. Classic cocktails befitting its art deco interior are meant to be sipped slowly, as well as appreciate for their appropriate glassware: heavy crystal tumblers for an Old Fashioned, a funky skull mug for a Mai Tai. But one truly modern amenity? The Champagne Call Buttonwhich you should absolutely pressthat dispaches a lovely server to top off your bubbly.