Certainly some casino patrons enjoy smoking while they gamble, and they may be more likely to visit a casino that permits it.
One reason casinos may choose to allow smoking is because they historically believed that it would attract more customers.
In some places, this means that casino operators are allowed to permit smoking inside their establishments. In many parts of the world, casinos are considered entertainment venues, and as such, they are subject to the same laws and regulations that govern other types of businesses that offer entertainment.
