Unlucky number 4

In Korea, the number 4 is considered very unlucky for the reason that it sounds exactly like the Korean word for death, which is pronounced "sa"(which also happens to be the word for a shrine or temple). Hospitals never have a 4th floor and many other buildings don't either and if they do it's often listed as an "F". So is it just a coincidence or is my school trying to make a statement about the foreigner teachers by giving us all apartments on the clearly-marked 4th floor in the school where I work?