The showers are interesting!  I want you to imagine a small grey box similar to an electricity sub-station.  Entry is with a key which one uses to unlock and then relock the door once inside, a necessity should you require privacy.  The inside houses a huge boiler, various brooms and brushes for cleaning, a long trough with 4 separate taps at various intervals and 2 shower cubicles with hanging plastic curtains.  The hot and cold taps are at the height of the shower head, so one does not need to be too short, otherwise the whole process would be impossible.  I think that the plumber was either very tall or ran out of copper pipe during the installation.  Hot water was plentiful as was the very cold water, both were experienced in the delicate tuning of mixing the two for a preferred temperature.  Not easy whilst groveling far above ones head but eventually achievable.