In Gin Rummy, players use their cards to create runs and sets, and when a round is over, they "knock.". Before calculating the points, the other player has the opporturummy 51 bonusnity to lay off any unmatched cards that are still in play. Played with two decks of cards and jokers, Indian Rummy is another well-liked variation that is similar to Gin Rummy. Another distinctive set of rules specific to Indian Rummy is the formation of at least two sequences, one of which must be a pure sequence devoid of jokers.