I remember learning to swim at a YMCA that was an old brick building. I have no idea when it was built. My impression from knowing that part of town is that it could have been pre-war. The locker rooms had open showers. I remember thinking it was really cool that you could just press a button and hot water would come out for some set period of time.

We probably showered in our bathing suits and then dried off and dressed as quickly as we can. Probably more out of parent-enforced modesty than anything we might have felt or known at that age.

My Jr. High and HS also had open showers and those were probably built in the late 50s-early 60s. Showers weren't mandated, but to be honest, we rarely sweated in gym class.