Concepts we like:
The wine bar in Berlin where you become a member, get a glass and pay whatever you feel is reasonable

The biscuits from Sweden that had a recipe on the side teaching you how to bake them rather than buying them

The café in Greenwich where you can decorated your own crockery.

Refills

The disloyalty coffee card in East London

"A history of the World in 100 objects" that links a museum to a radio show