This is not only a good idea for spies and those associated with various organized crime families (not picking on any ONE nationality...there are many) but also good for people with kids and older family members. For kids, you want to know how to get out as soon as possible if there is a meltdown or some such activity. For older people, maybe they have trouble with stairs so you want to be prepared.
In my case, it would be good for me to know so that I don't rush away from dinner with friends to head out to check my new car for dents and scratches only to find out what I thought was the exit was actually the men's bathroom.
That poor guy will probably have performance anxiety for the rest of his life.