Poker. Playing poker takes me strait back to micro classes. EV, game theory, all that. It's also useful for describing a whole range of human interactions.

Poker. Playing poker takes me strait back to micro classes. EV, game theory, all that. It's also useful for describing a whole range of human interactions. Downside - when you realize people are all cynical fucks, and they all behave in a sub-optimal, selfish way.