Kabuki Springs & Spa, San Francisco

A long-time San Francisco haunt, Kabuki Springs & Spa is the only Japanese style spa to offer communal bathing facilities in the heart of Japantown. The beautifully designed, dimly lit space exudes zen tranquility in a no-frills atmosphere where visitors lounge in the hot pool or on teak lounge chairs, sipping cucumber and lemon infused water.

The laid back vibe leaves you no choice but to unwind and partake in this traditional ritual - and although you find yourself in a space with others, it feels like there is no one else in the room. 
Relax in the hot pool, dip in the cold plunge pool (if you dare), relax in the steam room or sauna, and definitely partake in the  traditional Japanese-style sitting shower (or rinse off in one of the standing showers us Westerners are used to).
Beyond the communal bathing and wet area facilities, Kabuki Springs & Spa offers a full menu of massage, body and facial treatments inspired by various traditions. Therapists tend to specialize in specific treatments and staff is happy to make recommendations based on your preferences. Therapist John C. is a master of Shiatsu the way it should be done - no oils or lotions, just pressure and movement.
The communal baths are open to women only on Sundays, Wednesdays and Fridays, and to men only on Mondays, Thursdays and Saturdays. Tuesdays are co-ed and bathing suits are required and a valid photo I.D. is always required to use the baths.
For more on Kabuki Springs & Spa, download Spa Wanderlust for Apple or Android.