They are basically totally extinct in the US, so from a US perspective they are very unusual.
In the US they fell out of favor during the 1970s because it was argued that they discriminate against women, as men could use urinals for free.
ahh funny fact. thanks. in NL here they had recent debates on this actually. now its i think mandatory for public events to include also proper toilets for women, rather than just the stand n piss buckets they got peppered around.
What's the state of public toilets in the US? Are they usable and clean? Because that's why you pay for them over here, to make sure someone keeps them clean.