The article also mentions dice and music games and something called "finger fillet."
http://kotaku.com/5845400/how-to-master-the-fine-art-of-rage-frenzy
Also there is a gameplay video at the bottom of the page. I've never played Pokemon or MAGIC: The Gathering card games before, but I gather they work something like this?
Anyone heard more about some of these mini-games? It seems potentially a single playthrough of RAGE could last a really long time if you spend some time gambling.