I think the dress policy at Sauna Sauna is pretty much anything goes
(could be corrected one this one!)
I've been a few times, started off in Speedo's, thro lycra shorts and
lacy thongs to the last time I went I took a couple of leotards and a
pair black tights along and had a whale of time with several horny guys
upstairs.
They were talking about New Years day being an "anything goes day", not
sure of anything is happening with that yet.
I think you'll find its one of the most laid back and friendly sauna's
in the country, its certanly my destination of choice these days