Spas with adults only in San Francisco

Oakland float and sauna studio near Grand Lake with private float tanks, infrared sauna cocoons and cryotherapy, open daily 11am-8:30pm.

Adults-only hotel spa in Sausalito, California, offering day passes alongside yoga and a restaurant on site.

A reservation-only day spa on El Camino Real in San Bruno specializing in head spa therapy, scalp care and lash services for adults.