When it comes to casino, most people picture the glittering Las Vegas megaresorts. But the word’s Merriam-Webster definition is much broader: “a building or large room used for social amusements, especially gambling.”

Casinos have long been an important part of American culture. The earliest evidence of gambling was found in China 2300 BC, and the game of baccarat first rose to prominence in Europe in the 1400s. Today, casinos are everywhere—even in many small towns. They rake in billions of dollars each year for the companies, investors, and Native American tribes that run them, as well as local governments.

In addition to their gambling operations, most casinos have entertainment and luxury amenities that attract tourists and locals alike. These include luxurious accommodations, stunning water shows, fine dining, and high-end shopping. Casinos also offer a wide range of games, including slot machines, table games, and card games. A recent survey by Gemini Research indicated that slot machines are the favorite of most casino gamblers, with blackjack a close second. Other games, such as keno and bingo, are far less popular.

The popularity of casino gambling is fueled by the belief that it can lead to winning big money. However, the mathematical odds are against you. In fact, according to PBS Frontline, a person betting $100 an hour at roulette will lose about $5.26 an hour in the long run. The best way to avoid losing too much is to start with a fixed amount of money you’re willing to lose and stick to it.