My family played this game while on an airplane and were having so much fun that the passengers next to us and even 1 of the stewardesses wanted to know where they could get their hands on a deck. (A great missionary tool).
We even made up an additional card (Gadianton robber card) which can steal a charity card from another player if they have one, but if you ask and they don't have one then the robber has to give that player one of his if he has one. Just a little extra twist which added some extra fun.