Again, why would you do this? Just go to one of the countless public toilets outside. How often are people trying to use the toilets in a restaurant without eating there? It seems insane they would even worry about this.
Also, my experience in Germany at a mall food court is that they DO charge you to use the toilet there, even though I was eating there.
> Just go to one of the countless public toilets outside.
If there even are public toilets, if they are open, if they are in a state to be used (and not just an uncleaned mess), if they are free... plenty of reasons to go to a restaurant to use their toilet.
Tell that to Germany and a bunch of other countries in Europe (then again having to pay to use a toilet still sounds a bit better than having no toilet to use at all..)
Also, my experience in Germany at a mall food court is that they DO charge you to use the toilet there, even though I was eating there.