I've been a couple of times, as well as on a couple of trips to Vegas and ski trips with stops in Reno and South Lake Tahoe. Every casino I've been in has been the same.... all smoke dens. Usually there is a nonsmoking slot machine room and the poker rooms are nonsmoking, but it really doesn't help.
Did you notice the number of people playing slots while smoking and dragging an oxygen bottle with them?
"I tasted death many times on the river today. Do you want to know what it tasted like? Do you REALLY want to know? Well I'll tell you then: it tasted like BEEF JERKY." - unknown paddler 8/1/09