Patrons of Karma Kitchen don't need to fight for the check at the end of a meal. There isn't one. Instead, the guests" of this restaurant are handed a gold envelope with a handwritten note on the outside that says, "Have a lovely evening." Inside a bookmark-sized card states: "In the spirit of generosity, someone who came before you made a gift of this meal. We hope you will continue the circle of giving in your own way!" The sound bite for this restaurant is that meals cost whatever you want to pay, starting at zero. But the real idea beneath it runs deeper than the cost of a dinner. "This is about creating a shift in perspective," says Mehta. "It's a very simple shift but the shift is fundamental. It is a shift from transaction to trust. From a contract to a compact. From being separate to creating community." While too puny to regard as any serious challenge to Western economics, this restaurant fits loosely into a smattering of activities across the country and abroad that operate under the principles of the "gift economy." The common principles are volunteerism, no pleas for funds, and a view that these activities are not about changing the world. The ethos behind "gift economy" activities is to offer goods in the spirit of service with the conviction that the act, if genuine and without strings, will be self-sustaining. Put simply, a service or product is offered with the assumption that the act of giving is its own reward, and that it is likely to generate more giving in an ever-enriching circle.

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