Answer by Chamath Palihapitiya:
I learned poker from my first boss out of school. We used to play bridge but then abandoned it because there was so much cheating (in bidding etc). So he taught me poker, I fell in love with the game and then have spent much time and money since unsuccessfully trying to master it. It is an amazing game and I would highly recommend everyone learn to play it. It's a great blend of risk, psychology and game theory.