The first time I ever went to Kabuki Spa, I was visiting from DC. I'm pretty sure it's one of the main reasons I decided to move to SF instead of New York (thanks Kabuki!). The spa offers massage and other traditional services, but the biggest draw are the communal baths.
Step into the large stone room and you're immediately transported to a zen paradise far from the stress of city living. Bathing suits are allowed (and actually required on the one co-ed day) but this is really a place to be with yourself in your, um, natural state and the birthday suit is the outfit of choice.
The baths feature several showers, a steam room, sauna, large hot tub and a plunge pool kept a chilly, "invigorating" 50 degrees. Talking above a light whisper is forbidden and a large gong in the corner is on stand-by to remind those who forget.
Herbal tea and lemon or cucumber infused water are available to help keep you hydrated and wooden benches and lounge chairs provide a great spot for meditation, cat naps or studying for the LSAT. The only downside - it can get crowded.
CO-ED, Clothing Required: