Starbucks 2.0: Terra Bite Lounge, Where Coffee is prices are based on the people who are inherently good...
Maybe I'm just a bit oh I don't know, jaded? But this should prove to be at least interesting. Only in the area of Seattle could I see this working and the Kirkland area is an area where people do tend to be a bit more honest. Terra Bite Lounge is an upscale cafe in Kirkland, WA that doesn't list any prices on its menu. Expresso and muffins are not free either though.

Double Mocha with Non Fat milk - Your cost: whatever you think it's worth