Maybe men’s room should just have silk trees or bushes in them. Have a trough on the ground that drains with a little water running afterward to clean it up.
Your post reminds of a bar in Mexico I saw as a kid, the foot rest that ran the length of the bar was also a tiled urinal so that you could pee while talking and drinking at the bar.
Well, there was a supper club around here that covered a wall with rocks and then sent a thin stream of water down it to the trough in the floor. There were some leaves and branches up around the ceiling in there. Maybe they had a similar idea.