For players who prefer a more cerebral approach to card games, Contract Rummy is an interesting option because of its emphasis on strategic planninrummy apk real moneyg and flexibility. Another intriguing variant that incorporates aspects of other Rummy games with its own special rules and tactics is Kalooki. Usually played with two decks of cards and suitable for two to six players, Kalooki places a strong emphasis on both deft play and calculated choices.