A casino, or gambling house, is an establishment that offers various types of gambling. Casinos are often built near or combined with hotels, restaurants, retail shops, cruise ships, and other tourist attractions. They may also be operated by government authorities. In some countries, casinos are licensed and regulated by gaming boards.

The games played in casinos are based on chance, but some have an element of skill. Players compete against the house (the institution running the game), and in some cases against other players. Most games have mathematically determined odds that give the house a long-term advantage, known as the house edge. Some games have a lower house edge than others, and some have no house edge at all.

Some casinos specialize in specific games, such as blackjack or craps. Other casinos focus on particular geographic regions or offer a combination of different games. Some casinos are also renowned for their entertainment offerings, hosting concerts, shows, and other events.

Casinos employ a variety of security measures to protect their patrons. Most have cameras installed throughout the building, and some even have catwalks that allow surveillance personnel to look down at the table or slot machines through one-way glass. Some casinos also have support resources, such as hotlines and counseling, available for those who have issues with gambling addiction. Those who want to reduce their risk of problem gambling should manage their bankrolls, set aside money for other purposes, and use support resources when needed.