Mahjong

Mahjong is a Chinese game about lining up tiles in a mathematically perfect fashion. The table must have a fucking lip, and making a lip out of balsa wood is unacceptable. You can only truly play Mahjong on a manufactured table. They take their Mahjong seriously, enough to bet money on it, and to have clockwork tables that shuffle and deal rows of tiles under the surface like something out of a James Bond film. The 'match-2' version you play on your computer isn't MahJong; it's called 'Shanghai' by white people and "that stupid game white people play" by the Chinese.

If you're gwailo, easiest way to explain this game is: it's almost exactly like Gin Rummy. You wanna make three-of-a-kinds and straights, the tiles have suits and ranks like playing cards, and you can pick up discards from the middle of the table.