Some years ago I stayed in a hotel outside London, and they apparently had a policy of saving as much as possible on soap bars.. so they used some horrible high-pH soap, very cheap looking. But it was nearly impossible to rinse it off.. took me fifteen minutes of hot water usage after I was, or should have been done with the shower. Whatever they saved in soap they lost many times over in water and even more in energy use.

And in a tourist place on an island farther south the room had an information binder which also asked that you shouldn't waste water as there weren't many natural resources for water there. However, the hot water came from the far end of the narrow, rectangular-shaped long hotel, and the pipes were outside and weren't insulated, they were completely bare. Whenever you turned off the hot water for a few minutes it would take some five minutes to get it back, water running, as the pipes got cold right away (there are many other usages for hot water than just using the shower - the rooms had kitchens). So of course all the guests used many times more water than they would have needed, not to mention the wasted heat. Totally baffling.