I recently (read a couple of days ago) gave some serious thought to inventing a game to play in pubs, for drinks or coins, where the playing equipment was at hand. The game i came up with I'm calling The Notte Game as thats where i first played in yesturday; i wrote it up today.
The equipment used was a beer mat and 18 coins/ matchsticks, the players drink their playing piece.
When i say game i mean a tactical exercise, one player against the other, not calling out/ tossing coins etc - you know the ones. I know theres no money in it but it was fun.