A casino is an establishment for certain types of gambling. The word is derived from the Latin caino, meaning “a small house” or “gambling hall”. Casinos are usually combined with hotels, resorts, restaurants, retail shops, and other entertainment facilities. They may also be located on American Indian reservations, which are exempt from state gaming laws.

In the United States, the most famous casinos are in Las Vegas and Atlantic City. Many other cities around the world have casinos, including Monte Carlo in Monaco, Winstar World Casino in Oklahoma, and the elegant spa town of Baden-Baden in Germany. Casinos are also often found on cruise ships and in other tourist destinations.

Although gambling probably predates written history, the modern casino is a relatively recent development. It became popular in the 16th century, when a gambling craze swept Europe, and Italian aristocrats held private parties at venues known as ridotti (literally, “little houses”).

Today, casinos are often large, luxurious buildings with multiple gaming floors. They offer a wide variety of games, such as blackjack, roulette, and poker. Most have video surveillance systems that can spot cheating or stealing by patrons. The security system can be adjusted to focus on a particular suspicious patron or to monitor specific table games. Casinos can also use a high-tech “eye in the sky” system that allows security personnel to watch all the tables and slot machines at once. This system can even detect if a patron is wearing a mask or other disguise.