Make your group session an alfresco one. The LakeHouse Spa, at the Lake Austin Spa Resort, will rent you an outdoor garden suite for six, complete with hot tub, waterfall, treatment tent, and shower; lakeaustin.com.
Sip Champagne in a bay-windowed nook overlooking Newbury Street between treatments at the g2o Spa and Salon by Guiliano, or watch a fashion show sponsored by the tony boutiques nearby; g2ospasalon.com.
Lounge in the Loop at Spa Space, where Second City residents book everything from sushi snacks to handwriting analysis to psychic energy readings; spaspace.com.
If the panoramic view of Pike's Peak from the quiet room terrace at the newly renovated Spa at The Broadmoor doesn't stun your senses, the Harmonic Hot Stone Therapy Massage with Tibetan "singing bowls" will definitely soothe your psyche; broadmoor.com.
Washingtonians love the grand space and grand value at Robert Andrew—The Salon & Spa. For every six of you booking a facial, massage, and lunch or dinner, one gets the works for free; robertandrew.com.
Serenity rules at the Spa at Mandarin Oriental, Miami. Instruction in the art of Thai massage? No problem. And comfy jammies are provided for everyone. Fancy frozen-fruit skewers on a beautiful beach? Step inside your private cabana and relax; mandarinoriental.com.
At The Grand Hotel Minneapolis, get treatments at the LifeSpa Aveda Concept Salon, luxuriate in the pool beneath a cloud-painted ceiling, take a handball lesson, and sample delicious sake and sashimi; grandhotelminneapolis.com.
If you're not relaxed after the Tui-Na Massage at The Spa at Silverado, an hour from San Francisco, a VIP tasting at the winery next door should do the trick; silveradoresort.com.
New York City
Sure, the Dashing Diva is a full-service spa, but it's the party-with-a-pedicure attitude—free cosmos to accompany your Cotton Candy polish—that's really pulling them in; dashingdiva.com.
Angelenos flock to the Spanish Colonial-style Spa Ojai, where an en masse mud treatment in the Moroccan-flavored Kuyam chamber will get you in the mood for a tribal-dance lesson—or not; ojairesort.com.
Point Clear, AL
It's water, water everywhere at The Spa at The Grand Hotel, from the luxurious Ocean Silk body treatment to the tranquil movement studio to the breathtaking view of Mobile Bay; marriottgrand.com.
Private hot tubs surrounded by woodland are the main draw at Ten Thousand Waves; the one called Waterfall has a rock deck, its own sauna, and a private plunge pool; tenthousandwaves.com.
Want to hang out in a Northwest lodge-style spa? Habitude at The Locks is the top serenity spot, with calming treatments inspired by Native-American traditions; habitude.com.
A soupçon of France in the Finger Lakes, Spa Mirbeau, near Syracuse, enchants you with treatments like the Impressionist's Retreat clay wrap; mirbeau.com.