i was in a pub in the saltmarket in glasgow which was a bit of a dive (but the pints were exceedingly keenly priced).
strangely there was a queue for the gents so i joined said queue. after quite some time i reached the front and found that the toilet didn't have a toilet or any urinals. people were queuing to relieve themselves in the single sink
(and no, i did not).
this was 20 years ago and i can't actually remember the name of the pub but i remember it had a nautical themed title. i do hope it is no longer providing such exquisite facilities.