... of course this is so redundant but urinals are an obvious solution for half the population and already in place... Like I said there would be a massive cost this is nowhere near trivial like someone stated. I also mentioned there may be other solutions (like redistributing the resources in another way, while probably similarly expensive for little utility imo). unisex bathrooms is a separate idea. Most of the time there aren't huge discrepancies anyway it's not like men's bathrooms are always idle while women's are always out of control so the efficiency isn't really an issue 99% of the time. If we are just moving urinals inside a shared area why are we doing it at all? We're just making one big line. It's nice that you don't mind waiting for your partner but try selling that to the guy who takes 15 seconds and has to go to the back of this new line. It doesn't make any sense

Intelligent building would forecast demographics and optimize for the future I guess if you really just want "max efficiency" I assume this is already being done to an extent, but changing things already built sounds expensive af for little to no value in my opinion.