Re: Western terminology
--- In addition the "unlucky 13", the Chinese (Taiwanese, Indonesians, some San Franciscans, etc.) have an aversion to the number 4 ---
What part of my comment made you believe I was unaware of unlucky 4?
In any case, the cultural blindness to "missing floors" can be used to advantage.
In the case of the aforementioned hotel, there was indeed a 4th floor, but it was a "service floor" with environmental gear, laundry, and kitchens conveniently placed above the public areas and meeting rooms and below the guest rooms. The service elevators did have access to it.
Not sure how much to lean on the veracity of "Get Smart", but there was an episode where the main office of KAOS (main opponent of Smart's group CONTROL) was on the 13th floor of an office building.
Something of a Purloined Letter writ large.