A casino is a public place where a variety of games of chance are played for entertainment and money. Games of chance such as blackjack, poker and roulette bring in billions of dollars in profits every year for casino owners. But they would not exist without the millions of patrons who gamble at them.

Modern casinos have a lot of amenities that help draw in customers and keep them gambling, such as restaurants, free drinks, stage shows and dramatic scenery. But despite these luxuries, the vast majority of revenue still comes from gambling. Slot machines, roulette, baccarat and craps are the most popular games of chance in American casinos. Other games, such as sic bo and fan-tan in Chinese casinos, or pai gow and two-up in Asia, also attract players.

The elegant spa town of Baden-Baden became a playground for European royalty and aristocracy 150 years ago, and its casino is considered one of the world’s most beautiful. With red-and-gold poker rooms and 130 blackjack and roulette tables, it draws visitors from across the continent. Other casinos are more low-key, such as the Golden Nugget in Las Vegas, which caters to locals with low betting limits.

Most casinos offer comps to their best players, or “good” players, who generate large amounts of money for the house. These perks can include free hotel rooms, meals, tickets to shows and even airline seats. These rewards are designed to encourage gambling by making it more affordable, or appealing, to bet large amounts of money.