Who has actually found a sauna that allowed nudity?.
If you ever visit the CT casinos, the spa in the Grand Pequot at Foxwoods had steam room, sauna and jacuzzi in the locker room where nudity is encouraged. The Fox Tower has a bigger setup but I found more guys wear bathing suits.
There are two in Portland - Everett House (which is the best IMO) and Common Ground Wellness Coop. There is also a russian banya in San Francisco - Archimedes Banya which has a clothing optional area and a night where the entire floor is clothing optional.
The gym I belonged to had a sauna in the mens locker area. It was usually used nude but some were wrapped in a towel and a few came in dressed for the squash courts to warm up.
When we visited the Czech Republic there was one. Spa where nudity was allowed, including in the saunas.
A few years back there was a private gym a business had for employees, built below first floor. You had to have a key card but practically no one ever used it because of the limited equipment. My wife and I used it occasionally.
It was nice, had a small steam room , sauna and a shower are that had maybe four shower heads and not divided into stalls. I usually went early evening weekends, on members who used it was a handful of females. But my point is the sauna/steam room and shower area was nude.
You can move about freely, no one judging. A few times I enjoyed the company of female members, in steam room and sharing shower.
The sauna had problems staying hot enough,
I actually miss that place