What about this:
Not so many decades ago, the phrase "Paris public toilets" evoked images of smelly streetcorner pissoirs, hole-in-the-floor squat toilets at neighborhood cafés, and lavatories ruled by female attendants with the demeanor of prison guards. Today, nearly all of the vespasiennes or pissoirs are gone, and tourists of both sexes are well-served by modern, self-cleaning toilets known as sanisettes on boulevards and in parks throughout the city.

The sanisettes come in several styles, but all have the same basic design: You press a button [[or, in some cases, insert a coin) to open the door, and when you step inside, a sensor in the floor causes the door to close and lock. You do your business, then open the door and exit. The door closes again, the toilet is automatically cleaned and disinfected by a motorized mechanism, and a green light signals that the lavatory is ready for the next user.
http://europeforvisitors.com/paris/a...ic-toilets.htm
Yes it would cost upfront, but think of the savings in the long run. Who says America has the best standard of living in the world?