At the Karma Kitchen in Berkeley, Calif., customers pay what they want – including nothing – for a meal.
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 bookmarker-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!" (CS Monitor)