The first reason is that some people simply want to gamble without time restrictions. I’m a casino dealer, and I believe there are two main reasons some casinos are always open. In turn, this translates to more profit for the casino, at least in theory.
This is better for the players as if there is no closing time, they can gamble whenever they want.
But most casinos in Las Vegas and London are open 24 hours a day, 7 days a week.
