Helpful directions in Edinburgh

[imbrius]

Businesses here sometimes have a policy of restrooms being only for paying customers, but even that has been attacked recently as discriminatory.

Pay toilets used to be very common in the U.S. up until half a century ago, hence the stereotypical humorous rhymes. Also, yes. In areas with a very high population of transient persons with habits of using illicit narcotics, combination locks and token fee systems are common. Off the top of my head I can think of Portland, Oregon as one place where an open-for-all-to-use restroom is the exception rather than the rule, but that's slowly shifting as the city moderates its affordable housing crisis.