Gin Rummy is easy enough for novices to learn, but it still has depth for more experienced players. With two decks of cards and the rlow-limit slotsequirement that players form at least two sequences, one of which must be a pure sequence devoid of jokers, Indian Rummy is another popular variation. Canasta and Kalooki Rummy are two other noteworthy variations that add distinctive twists to the classic gameplay.