In response to my request if a map exists that designates the location of public facilties (WCs), the Paris Tourist Bureau has informed me that, to their knowledge, no such map exists.
If anyone spending time in Paris has nothing better to do, they should make such a map for Paris visitors.
Re: facilities at Metro stops? The answer fro, the Paris Tourist Bureau was:
“All Metros haven’t toilets But there are ‘Sanisettes’ throughout Paris.” These are huge plastic looking freestanding WCs that look like they should be in Woody Allen’s movie SLEEPER. You can try these out – but I think I’d opt for the closest cafe.