"Nazis" and "pedophiles" is rather extreme, since this was pretty much how we all had to shower when I was in junior high and high school. :-)
Maybe they have individual stalls for everyone these days, though. It's been many a year since I was in a junior high or high school, and that was when I was doing psych testing for the school districts, and I luckily never needed to go near the showers. :-)
Large "communal" showers were certainly not uncommon back in the overcrowded years, I am sorry to say. Can't say for sure that's what happened here, but it did used to happen quite often.
Oh - oops! I think I misunderstood. Are you saying there WASN'T a shower room near here? If there wasn't, then this may be an unofficial dayhall area for "overflow" clients. That is, many dayhalls during the "hideously overcrowded" years were exactly like this except some didn't have the "luxury" of benches. If they had a huge overflow of folks then they would have had to come up with places for them to be when they were awake, so perhaps they took a downstairs area, added benches for "comfort", and then started using what would normally be a hall or basement area as a dayhall. Of course, that would totally suck, but back in the "hideously overcrowded" days things were pretty dang crappy for everyone involved.
Well, after all these comments I am sort of embarrassed to admit this, but in several sections of the campus I work on we are set up just like this in the bathroom/shower areas. To tell you the truth, however, I think you have to look at this like a "normal" health club locker room or the locker room when you were in junior high or high school. They have plenty of benches so you can sit when you are changing into and out of your gym clothes. You would swap out of your gym clothes before you showered and into a robe or something, then go into the shower, then come back out and switch into your street clothes if you were leaving or your jammies if you lived there. Make sense?