In Michigan, the casinos lobbied for the smoking ban which they got an exemption from.
In Delaware, they fought against the ban. In fact the casino in Dover financed a movement to get changes made to it which included exemptions for them and bars.
The only exemptions are for volunteer fire companies and private clubs. The local Catholic Church and a few other churches ended their bingos because while the VFD’s were exempt, they were all denied exemptions. Churches don’t have the political clout in Delaware that the VFDs have.