Hell. In that case, leave out the toilet and put a sign on the door saying, “Plase Confine Your Sexual Activity to This Private Room”.
You have DOORS on the stalls in the public restrooms where you live? You’re lucky.
Here in the Phoenix/Scottsdale are where I live, as a long distance runner I have occasion to visit many different restrooms in many parks in the area.
No doors in the men’s rooms. There are doors in the ladies’ rooms per my wife.
If you want privacy, the best you can do is try to get the stall at the end of the row so not everyone will walk by to say Hi.