I only wear them if I have too, one gym that I go to on occasionsrequires you to be covered in the hot tub, steam and sauna, I have an old pair of tighty whites I use there when I go that does not leave much unseen when they are wet, I have been asked a couple of times did I have anything a little more concealing and just said no, I have not wore them in years and the is the only pair I have left and the sign says you must be covered when in wet area and I am covered. They haven't said anything since.
I only wear them if I have too, one gym that I go to on occasionsrequires you to be covered in the hot tub, steam and sauna, I have an old pair of tighty whites I use there when I go that does not leave much unseen when they are wet, I have been asked a couple of times did I have anything a little more concealing and just said no, I have not wore them in years and the is the only pair I have left and the sign says you must be covered when in wet area and I am covered. They haven't said anything since.
In most European countries all clothing is forbidden in hot tub, steam room and sauna on the grounds of hygiene - the only stipulation is that you must sit on a towel in the sauna.
I never wear underwear unless I'm out shopping (which I despise) and have to try clothing on for size. I wear a thong at the beach if I can't be nude. If the beach does not permit thongs or strings, I go somewhere that does. Sometimes you just have to ask and you might like the answer you get.