Every variation of Rummy Royally offers a different take on this ageless card game, regardless of your preference for the original. Rummy Royally is fundamentalwhat is the function of slots provided in the castle nut?ly a social catalyst that strengthens bonds between players rather than merely being a card game. There is a lot of laughter, good humor, and sharing of experiences when people are gathered around a table with friends or family. Players create relationships through mutual wins and losses as well as intense competition.