Also, Canasta has particular guidelines for wild cards (jokers and twos), which can be used to finish melds but result in point penalties if not usedpte available slots carefully. Canasta is a popular game for friendly competitions and family get-togethers because it combines strategy, teamwork, and social interaction. Overview of Contract Rummy. A fascinating twist on the traditional card game, Contract Rummy offers a methodical approach to gameplay & melding.