Sometimes you just really want to indulge in a soak, and 100 percent of the time you really don't want to worry about who — or what — got a little too relaxed in a hot tub before you elected to dive in. There's a reason these tubs have been here for 30 years: Healing, not hookups, is the order of business, with massages, body wraps, and other rejuvenating skincare services available alongside just sweating and soaking. All are offered in private settings that are small enough for you to sneak in off 24th Street nearly unnoticed, but big enough for intimate groups of up to six health-seekers. The private outdoor tubs are one of San Francisco's most relaxing secrets, with seclusion under the nighttime stars available every day until 11 p.m.