G Spa Lounge at the Hotel Gansevoort in New York
The Gansevoort's spa may be located in the basement, but there's nothing dingy about this retreat tucked beneath the hotel in Manhattan's bustling meatpacking district.
Spa goers come for the signature "Hit the Spot" massage (a combination of acupressure, deep-tissue and Swedish massage) or the Mehta facial, which claims to reduce wrinkles and under-eye bags and puffiness -- a great way to get ready for an evening out on the town. And you won't have to go far to find a party, since the spa transforms into an uber-cool bar and lounge at night.
Treatment rooms turn into private cabanas (with a steep three bottle minimum), while the spa's infinity-edge soaking pools are covered with Plexiglas and transformed into shimmering dance floors. But good luck getting in; G spa only accommodates 75 people and young celebrities like Jessica Simpson and Jamie Lynn Sigler get first dibs.