Panera's "pay what you want" cafes

Panera has been converting some existing stores to a "pay what you want" model and it appears to work. "'They feel like every other Panera Cafe in America; they don't feel the least bit different,' says Ron Shaich, co-founder and co-CEO of Panera Bread Co. Well, there is one difference customers will see: There's a donation box where the cash registers were." (NPR)