There are several churches in my area that have a Bingo night....some have a casino night too. I've also seen church raffles.....etc. The Judea Christian Bible mentions the Israelites "casting lots." So, I don't know if gambling is a "sin" but I do know that there are quite a few churches that have no problem participating in the activity.
There are churches for real that truly if there's an occasion they conduct raffle ticket to their program, and I don't know if that is considered as gambling tools. But for me, gambling is really a sin.