Bible did not talk about gambling. Although the love of money is the root of evil is in the Bible but nowhere in the Bible that talks about gambling specifically.
Pastors, other men and women of God can against gambling and speak against it but Bible did not mention gambling in any chapter or verse.
I like this part honestly that the love of money is the root of evil and yes gambling isn't a that significant in the bible whereas most religions don't really talk about it cause of how they see it, and at such they see it as sin and I think it's same thing with the muslims but basically there are a lot of people that hide and go about their lifestyle. And again even with the fact that such gambling habits is prohibited there are some gamblers that go extra miles to gamble without anyone notice and this is the love of money. So even if the casino can honour Ramadan I think they do it as a mark of remembrance and celebration nothing so special.