We are all superstitious its inherent to us as human beings, even if it is not Fengshui like shamanism or any religion they will always connect something into it to have good luck and be guided in a path of uncertainty, but Fengshui is not only about superstitious like what I've been saying it has something to do with harmonious and clear thinking, I do believe in Fengshui but I am not a serious practitioner but I notice people who seriously practice Fengshui are happy, clean people and very meticulous on how they place things and check up dates for their activity.
Superstitions apart, fengshui does exist and works, at least from an harmonic, welfare point of view, as people feel much better and even more inspired at organized environments where the colors, items positions and layouts match with each other.
The environment affects and impacts our productivity and desire for improving our skills and the results we can achieve through them at every activities of our routine.
Regards gambling, I fear fengshui will be useful only to improve gamblers' confidence and pleasure of the betting experience, since outcomes don't depend on them, but on luck.