Not sure why the question of gym showers keeps coming up on here; other then it being a thinly veiled attempt at exhibitionist/voyeur fantasies, but this is always a question I cannot answer to the degree of satisfaction it's obviously seeking.
First, I can count on a finger the times I've used the shower in my gym and that exception was only due to having the mains shut off for a whole day at home due to a broken water heater. Since the few times I've had to even change in the gym has been limited to going after work and I went straight home afterwards, there was simply no reason to use the gym shower versus later on at home.
Second, since I've never gone to the gym with a friend, I cannot answer. I either workout alone or with my wife and while I consider her a friend as well, but she is not permitted in my locker room by nature of her sex. However I have been known to take a shower with her at home
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I've also often had to wonder every time these same posts come up where the hell people are working out at. Every gym I've seen including mine has separate showers with curtains so no one is standing next to someone else chit-chatting. Although I have heard some guys carrying on conversations with someone on their phone which seems not very well thought out seeing as how water and electronics usually don't agree with each other. I'll also say 99% of the guys using the shower seem to get dressed and undressed behind it's curtain and the few instances of unabashed locker room nudity I've witnessed has been old fat dudes who mainly seem to limit their workout to a brief spin on a stationary bike.
When I go to the gym it's to do what I have to and get out; not make it my second home with changing, showering and personal grooming. The fact I question the hygiene factor of my entire gym, but especially the locker room, is also why I try to expose little skin as possible while there. Just that one day mentioned of having to use the gym both to get washed and sit on a toilet for a #2 was enough risk for a lifetime. So sorry I can't contribute something fap worthy to the locker room as bathhouse fantasy.