As far as I am concerned Feng Shui is just another superstition. I would even go as far as comparing it to people who suffer from OCD (obsessive compulsive disorder) who, in many cases, have a need for order and to follow certain patterns of behaviour before doing an activity.

The effectiveness of Feng Shui on gambling can be easily verified with a study. Grab a bunch of people, note who follows Feng Shui, who doesn't and track their gambling performance. On a large enough scale I'm sure there will be no difference between the two groups. Otherwise the casinos would have gone bankrupt