I belong to a gym in a small upstate NY town. There were no showers at all until recently when new locker rooms were installed. There are two showers in the men's locker room, each with a curtain AND a small ante-room with ANOTHER curtain where one can change in private. Absurd! Then, to add insult to injury, a couple of weeks ago a notice appeared on the bulletin board requesting that men cover up at all times while in the locker room!!!!! I added a comment saying "OMG, a naked man in the men's locker room. Run for your lives!" The notice disappeared.
A few (mostly older) men will remove all their clothes, including shorts, when changing, then shower. All the younger men keep their underwear on, put on their gym pants, work out, then put on their street clothes over the same underwear and leave.
I think I live in a town full of really up-tight dudes.