The many variations of rummy, each adding a special twist to the traditional gameplay, are what make it so beautiful. Rummy variations that are widely used. While Indian Ru777 bettingmmy usually involves two decks and requires players to form at least two sequences, one of which must be a pure sequence without jokers, Gin Rummy is a two-player version that emphasizes strategic discarding and skillful play. Kalooki, which adds wild cards, and Canasta, which adds more scoring techniques, are two other well-liked variations.