You might have heard about Big Two card game before, it's unique as on this game card number 2 is the highest score card. It's easy to play. Four players in one table and each player must discard their card one by one or by combination.
The first player who manages to discards all cards becomes the winner.
Don't worry about getting lost, there's tutorial and also practice table available.
As a classic type of card game, Big 2 Bonanza can be a great killing time alternative on Facebook.
You can also chat with the other 3 people on your table while playing.