Casino, also known as gambling or gaming establishments, offer gamblers the opportunity to win money and other prizes through games of chance. They can be found in a number of places, from massive resorts in Las Vegas to small card rooms in mining camps. Casino games can be regulated by laws in some states and by federal regulations in others. The industry generates billions in annual revenue for the owners, investors, and Native American tribes that operate them.

Casinos focus on customer service, providing perks designed to encourage gamblers to spend more and reward those who do. A popular example is comps, or complimentary items given to high rollers, such as free hotel rooms, meals and show tickets. Casinos also use a variety of security measures to protect their patrons, including etiquette and physical rules for table games, and strict rules for slot machines and other machine games.

In addition to sophisticated surveillance systems, casinos use elaborate eye-in-the-sky cameras that watch every window, doorway and table. These cameras can be adjusted to focus on suspicious patrons by security workers in a room filled with banks of monitors. Other security features include the routines and patterns of games, which make cheating or collusion more difficult to pull off. Many online casinos that allow players to deposit funds without registering follow additional security protocols, and carry licenses from reputable regulatory authorities. These sites undergo regular audits to ensure they comply with their license regulations.