Well, I have never stayed over the casino. But, I have stayed above a lounge for bands/dancing on the Enchantment. I went to bed about 11pm, and the music was sooo loud I could tell what songs were playing. The bass was also horrible. I will NEVER book over or below a disco/music lounge again. I would think a casino would have less noise than a disco. If it is a great cabin location, I think I would keep the room, and hope for the best.
Good luck. Lil' Lori