@izzythepush,
This varies from state to state - for example in Montana getting a gambling licence is much easier - there are all these small places on every street corner (of course in the cities not out like in yellowstone park) - pretty much every restaurant and place with food has slots.
Then you have places like Las Vegas where it is all lavish or in other states that just allow Indian reservations to have casinos you tend to get the more lavish ones.
But yeah that is about the only "public" place that is still allowing smoking where ever.
I also just figured it seems casinos tend to pull in people with many vices - gambling, smoking and drinking...and over eating at all those buffets - although I assume buffets will go on the wayside at least for quite a while.