With its belowground location and flashy red palette, the Hotel Gansevoort's new G Spa (18 Ninth Ave., New York; 212/660-6733; might seem better suited for parties than pedis—and it plays host to both. Come evening, spa-goers trade their detoxifying Borba brews for $15 cocktails, treatment rooms morph into moody VIP nooks, and soaking pools are transformed into Plexiglas-covered dance floors. There are even plans to turn the rooftop cabana—the den's garden counterpart—into an alfresco bar. G Spa isn't the first of its kind to multitask (the Blue Spa Bar & Lounge at Munich's Hotel Bayerischer Hof launched a year ago), and it won't be the last (Townhouse Spa, a New York lounge and spa, opens later this month), but it is the most exclusive, with just 75 revelers allowed in each night.

Exhale Spa

Exhale Spa is located in Hotel Gansevoort in the Meatpacking District. Covering 5,000 square feet, the spa is known for its Core Fusion program, which has classes that combine pilates, the Lotte Berk method, interval training, and yoga. The relaxation area includes an herbal steam room and three hydrotherapy pools, as well as three private rooms for therapies like acupuncture and vibrational therapy. Spa services include facials, waxing, and manicures, and Exhale Spa often hosts group events and wedding parties.