At Aria, the biggest hotel at recently opened CityCenter, guests have their choice of three large whirlpools and three even larger pools. The cabanas include 42-inch LCD TVs and iPod docks. There's also Liquid, an adults-only venue with dipping pools featuring underwater speakers; (866) 359-7757, http://www.arialasvegas.com.
At the neighboring Mandarin Oriental, butlers attend to guests on the eighth-floor pool deck. Here, the flat-screen TVs in the cabanas come with PlayStation3 game systems; (702) 590-8888, http://www.mandarinoriental.com/lasvegas.
At the new poolside Sunday brunch at Azure at the Palazzo, signature dishes from Wolfgang Puck are on the menu. They include a French-style omelet and a lobster club sandwich; (702) 607-7777, http://www.palazzolasvegas.com.
The trendy Palms Pool & Bungalows is launching a poolside party under the stars on Friday and Saturday nights, with live DJs (cover charge). The place will also energize Sunday afternoons beginning May 9 with the new SunDance party; (702) 942-7777, http://www.palms.com.
As part of a multimillion-dollar makeover, the Tropicana Las Vegas, which turned 53 earlier this month, is transforming its 4-acre pool area into a tropical beach resort complete with its own nightclub; (888) 826-8767, http://www.troplv.com.
Not to be outdone by Aria, its big sister at CityCenter, Vdara offers guests an exclusive spa cabana. There's also an open-air lounge with tasty tapas, including a creation called "fried lobster corn dogs"; (866) 745-7767, http://www.vdara.com.
Now in its fourth season, the swank TAO Beach at the Venetian is raising the bar in true Vegas style. An ordained minister is available not only to perform poolside weddings but also to hear the confessions of those who overindulge in Sin City; (702) 388-8338, http://www.venetian.com.