The explanation of each terminology is mentioned in the 21 card Rummy Rules section 27 Card RummyĢ7 Card Rummy is played only with Point Rummy variant. There are many rummy game rules that you need to learn, but first, take a look at the multiple terminologies that are required to be understood to play the 21 Card rummy game like. This game is played between 2 to 6 players with three decks of cards and makes use of an extra group of Up & Down Jokers apart from the standard set of Printed and Wildcard jokers. 21 Card Rummy is played only with Point Rummy variant.