In Las Vegas, the gambling age is 21. There have been misunderstandings in the past, which have caused people over the age of 18 to get in trouble for trying to get into Las Vegas casinos thinking that they already were of enough age to spend money there. The most notorious case in the early 2010s Las Vegas visit by boy band One Direction, when they were all under 21. They were banned from visiting casinos in Las Vegas and they were forced to stay in their $18,000-a-night hotel room.