Very interesting, McSensei.
In America (as far as I know), there are no requirements to being a doorman, with the exception of being huge or especially kick-ass. Oddly enough, I was a security guard (unarmed, heh) for a while when I was around 20 or 21. I had to take a course, pass a test, and be vetted by the state police (I still have the card, LOL).
But being a doorman here seems to involve mostly just showing the interviewer that you can get out of a headlock.
Ironic, considering that most of the security jobs I had I could have slept through with little notice, compared to the much more active life of the average doorman.