Shoe (cards) must be dealt from a shoe (Scarne's invention). While no such ruling was ever passed, most Nevada casinos now deal from a multi-deck shoe. As gaming advisor to the Havana Hilton, Scarne also introduced the shoe to Puerto Rico and Cuba. The device is so named because the earliest versions of it resembled a woman's high-heel shoe, and were often painted red or black in color. Dealing shoes come in many colors and sizes, depending on the number of decks they are capable of holding (2, 4, 6, or 8 decks). When the cards are placed in the shoe, the
Casino game player at a time and do not require the involvement of casino employees to play. Random number games are based upon the selection of random numbers, either from a computerized random number generator or from other gaming equipment. Random number games may be played at a table, such as roulette, or through the purchase of paper tickets or cards, such as keno or bingo. Casino games generally provide a predictable long-term advantage to the casino, or "house", while offering the player the possibility of a large short-term payout. Some casino games have a skill element, where the player makes decisions;