Use flush valves so that the sound of a flushing toilet is completed when the door is opened. This keeps the sound of filling tanks from spreading throughout a building when doors are opened. Using lined transfer air ductwork, exhaust each room to remove smells fast. Provide self closing doors so pedestrians see these instead of toilets. Architects should sketch up these square footages and see the savings for themselves.
Communal restrooms are thus expensive and outdated technology.
Architects are designing brand new Model-Ts for a building owner when a 2001 Porsche 911 is available for less money. Toilets replace urinals and are priced similar. Even non-paruresis sufferers should prefer this arrangement. Worker and client satisfaction will increase leading to better productivity and increased sales. The increase in worker productivity may turn out to be similar to that of the personal computer.