One Greek tradition tells that when you enter a building you should always leave through the same door you entered from.
My roommate is half Greek and she learned this tradition from her mother. She told me the reason for this tradition was because if you enter from one door and leave through another the string of your life will become tangled.
This is an interesting tradition because it clearly comes from a belief system that is no longer generally accepted by people living in Greece. The idea that there were strings of our lives is now archaic but the cultural belief lives on, even without the superstitious meaning behind it, showing the power of tradition and the performance of this piece of heritage.