The idea that occurred to me was: What if a group of people collectively signed a contract that said one of them would be vegetarian everyday of the year? More specifically, say a group of 7 people signed a contract saying that each of them would go meatless on an assigned day each week. Thus, within the group each member could eat meat 6 days a week, but there would be one vegetarian at all times. The group could be 7 good friends, or it could be 7 individuals matched by the “commitment store.” And of course 7 is an arbitrary number - more ambitious folks could form a team of 2 or 3.