When I lived in San Francisco and brought family and friends to enjoy walking the streets of the city, one logistical problem was finding toilets they could use

When I lived in San Francisco and brought family and friends to enjoy walking the streets of the city, one logistical problem was finding toilets they could use. There are, for all intents and purposes, no public toilets in the city (e.g. we went to an underground public transit station and they worker there told us there was no bathroom available); one time my mother had to use a porta potty put in front of someone’s house for construction workers doing home improvements because there just was no other restroom around.