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.
This is something not a bothersome thing because we do have our own free will even though it is prohibited on some people due to religion but still they do decide to deal with it because they do like to then its their
personal choice and they are the ones who do commit such mistakes.
Prayer and gambling isnt really that correlated nor does affect winning chance thats why i could say that it isnt really that needed.