Panera Bread Co converted one of their St. Louis locations into a cafe without prices. I love this model, but I feel like it probably works better with one of a kind products (art, music, movies, books) that are likely to have passionate fans. I hope it works, though. Ron Shaich Panera's chairman had this to say:
I'm trying to find out what human nature is all about. My hope is that we can eventually do this in every community where there's a Panera.
(via @cdefazio)