We play by National Mah Jongg League rules and are using the current (2018) card. If you don't know what that means, don't worry. Just come out, and we'll cast some tiles. open to all players, whatever your experience level.
For those learners who have never played before, the following link is a very short overview of the game and you may find it helpful. https://www.youtube.com/watch?v=SJXKzGL1Apw
If you decide you do want to purchase a card, they run ~$8 and are available here: https://www.nationalmahjonggleague.org/store.aspx#