Right? People can shamelessly walk around the locker room stark naked and try to engage me in conversation, with their jibblets all hanging out, but it's suddenly a party foul when I try to crack open a cold one in the sauna? What kind of unfair nonsense is that?
My athletic club has a lot of "mostly retired" older guys, so they have nothing but time.

I avoid the early rush and prefer to workout with the "joint replacement crowd" in the later morning, which is a double-edged sword. Quieter gym time and never a wait for any equipment, but the locker room has an abundance of "hang out w your balls out" kind of old guys.
At my former private club (that was VERY old school & men's only until the late-1990s) I made the mistake of working out really early one morning and it was during the main pool's "naked swim" time, so there were a lot of old naked guys just air drying everywhere when I finished my workout. Evidently there was a 100+ year tradition where bathing suits were optional bc it was just dudes, so when they finally went co-ed, the old guard required set times that they could still swim naked. Our barber back then was in his 80s and sadly I saw more of him than really anyone should bc he is the one who gave me a lecture about "the before times".
Same place built hotel rooms on the top floors so when guys got divorced/widowed, they'd just stay at the club during the week and go home on weekends. It made sense since the club had everything (barber, tailor, dry cleaning, spa, dining, et. al)...but so many members got very used to just wandering around in various states of dress/undress and doing basically whatever they wanted, and staff just rolled with it. I miss that staff, some truly great folks who spent decades there, so the stories were epic.
I joke about some of these things, but I really am happy that these clubs have gotten a bit more modern and accepting of more types of folks bc it does make for a better experience. I made a point to diversify the memberships at all of the private clubs I've joined bc I think it improved the overall experience, even if some of the older members were a little unsure at first. Too late, got 'em in, and the younger membership grew, so the 40-50+ year members had to suck it up and deal with it.