Osento is an institution. It is a tiny little place that used to be someone's house, remodeled to feature two hot showers, one big hot tub, one cold plunge outside, a dry sauna, a wet sauna, and a deck where you can look at the stars. And a quiet room for napping! And a room for massage! Oh, it is a happy place. There's no clothing allowed, which can be scary for people but also really equalizes everyone. There's tons of filtered water and sliced limes on tap. And for a women-only spa, they have a pretty friendly gender policy - they're inclusive of post-op transwomen and of trannyboys too. Also: only $12 to stay there as long as you want! (I think they're open from noon to midnight every day) Cheaper if you buy ten visits at once - then it's more like $7. So great!