A casino is a facility for certain types of gambling. Modern casinos are often integrated with hotels, restaurants, retail shops, and other tourist attractions. Many states have legalized some form of casino gambling, although some have prohibited it or limit it to specific gaming facilities such as riverboats or racetracks. Several states, most notably New Jersey and Nevada, have large commercial land-based casinos. In addition, there are a number of Native American casinos.

Casinos use a variety of security measures to protect their customers and property. These may include physical security forces and specialized surveillance departments. In the United States, casinos are licensed and regulated by state governments. In addition, the gaming industry is closely monitored by national and international regulators such as the Nevada Gaming Control Board.

Casinos are also known for hosting live entertainment events such as concerts and sports matches. In the past, some casinos were notorious for their seedy reputation, but the industry has improved dramatically in recent years. In particular, modern casino technology has facilitated security and monitoring. For example, chips with built-in microcircuitry interact with casino electronic systems to allow casinos to oversee the exact amounts wagered minute-by-minute and quickly detect any abnormality; roulette wheels are electronically monitored to discover quickly any deviation from their expected results. Other examples of casino technology are automated betting machines and a system called “chip tracking” which allows a single monitor to display the current status of multiple games.