I have faith that prayer is the recommended thing to support success in action. But I don't think I have to pray to win the bet, this is very unnatural to me as I would obviously be guilty of my religious advice. I won't, and I'm just betting to please myself in my spare time. I just enjoy the game. Actually I am not too ambitious to win bets because this way can prevent me from spending a lot of money to enjoy the game. Having a limit is one that is recommended regardless of winning or losing.
It all depends on each other's beliefs and there are also those who pray before playing gambling which is believed to be able to help in achieving victory....
True, this really depends on each individual and his beliefs of spiritual.
With this aspect, I think, just respect each other's beliefs as mentioned many times. We have our own ways how to approach gambling, and some are really praying for the hope that they will win. It may be against their religion but everyone has their own freewill when it comes to this kind of practice. We have different religions here and it is all up to you how you live your life, so long you are not bothering anyone.