Concepts like undercutting, in which the opponent can add to the player's combinations before they go out, and knocking, in which a player can end the round by laying down their entire hand at once, are also included in the game. Gin Rummy igolds rummys a fast-paced, intense variation that calls for quick thinking and strategic decision-making because of these extra components. With their own set of rules and distinctive gameplay elements, Contract Rummy, Kalooki (also known as Kaluki), and Canasta are additional Joyful Rummy variations. Those who want to add more card games to their repertoire often choose these variants because they give players fresh challenges & experiences while maintaining the spirit of Joyful Rummy.