Black Jack is a popular card game often played in casinos. The goal is to beat the dealer by having a hand value closer to 21 without exceeding it. Each player is dealt two cards, and they can choose to "hit" for more cards or "stand" to keep their current hand. Face cards are worth 10, and aces can be worth either 1 or 11. Players can also place side bets, such as insurance, which is a wager against the dealer having a Black Jack (an ace and a ten-value card). The game combines skill and luck, making it a favorite among gamblers.