A combination of two gambling card-game favorites, 21 +3 adds some Three Card Poker side-betting to the essential Blackjack game play to offer a bit big rewards to an already generous format. Consequent from the ranking of hands in Three Card Poker, players of this game have the possibility to make a side bet on the Blackjack deal to payout if the combination of their two cards with the Dealer's single upcard can make a Flush, Straight, Three of a King, Straight Flush or Suited Three of a Kind.