Well Lounges traditional for whom we do not smoke are "inpecks" this persons can smoke to three kilometers away, but the smell brings it on they ever. So the casinos should be smoke-free spaces ... of any kind, but It is formalizing something that has been existed for a long time.
As regards the game, I think it affects more than those in the environment than themselves.
There is a poker player (Bill Smith) who won the World Poker Series in the year 1985 ... this story is of Mr. Doyle Brunson, if I remember the web with pleasure I put the link but he mentioned that that player when he drank whiskey playing poker was unbeatable and in fact the poker tournaments of the series in his beginnings allowed alcoholic beverages and smoke, in the present comtempooraneous it's not allowed.
Before the 1985 world title event, Smith, noted for an ever-present beer in front of him and a cigarette in his hand while he played, was broke and needed a friend to help buy him into the main event.
Upon winning the crown and a $700,000 first prize, Smith, in response to a reporter's question about his personal life, simply acknowledged: "There's not much to say -- I just drink and gamble."
Source:
https://lasvegassun.com/news/1996/mar/01/poker-champion-smith-dies/In any case with cannabis is to do something formal because it happens for many players at bedrooms, in the casinos there is no doping, so...ok.