You didn't cover the only type of sauna that maters for a bitcoiner: Standing in a room full of asics going brrr. I suppose you could consider it a type of dry sauna, at a pinch. :)

I had a small wet, by this article's definition, sauna installed in the garage of a home I rented before moving to Austin. In many ways I miss it, it was a great supplement after a workout.

But I'm clearly an amateur: I never had a sauna hat!