imagine this.... my old job
they bought a LOVELY farm house (a holiday home) in the middle of no where (and the farm to go with it) before they did it up there was 1 bathroom and 1 (indoor) toilet (in a room off of the bathroom)
we also had an ANCIENT hot water system so in order to even get a bath / use dishwasher / washing machine we had a VERY strict way of the very limited hot water using water...
BETWEEN US we had
1 bath of water in the morning
then washing machine
an early bath (needed to be run by 4.30pm)
a later bath (not as hot but warmish) about 7.30 pm
then dishwasher on after supper... 10.00pm ish...
there were often 2 or even 3 families sharing this hot water, so 5 - 7 adults and 6+ children...
so yes then we ALL HAD to share baths...
given that it was a working farm we would all do lots of farm work and the children would often get VERY muddy!
basically 4+ dirty people would share most of the baths...
(oh and it was fine, we all (me included as the nanny) had a GREAT time...)
also the rule was while in the bathroom, any children / same sex adults could just walk through the bathroom to the loo room and use the loo... with so many people and only 1 loo there really was no other way to do it...
and yes this was in the 21st century!