An underground poker room will usually generate revenue for the profit of the host(s) and/or to pay for operating expenses by collecting rake and/or other house fees while not being a licensed gaming operator. Organized crime groups, such as the American Mafia, often host, provide protection for, or are otherwise involved in high-stakes underground poker games. Underground poker venues can also generate revenue by selling food and beverages (with or without the appropriate licences) and/or by offering side games with a built-in house edge such as blackjack or craps in addition to (or as an alternative to) collecting rake and/or house fees, but this is less common.