Not so sure about that. The native run Casinos like Seneca Nation in Niagara Falls,Salamanca etc have smoking and free booze as long as you are gambling. I can't see many Americans coming over here with our archaic smoking,booze laws.Niagara will continue to gets Americans over the border. And with the low Canadian dollar Americans will keep coming over for a while.
About half maybe more of the Seneca Casino patrons in NF NY are from Canada enticed by the smoking and booze.