When I used to visit my big brother at Augsburg College in the late sixties, the Riverside Cafe had a cup on the counter (you ordered from the counter and picked up your order there, too.) You paid whatever you could afford and put the money in the cup. What a revolutionary idea! I was fascinated and impressed. Later they began to charge like regular restaurants did, but they remained somewhat counter-cultural and an important landmark on the U of M's West Bank. They were one of the earlier restaurants to cook with whole foods, and a neighbor to the North Country Coop, which was just a little further down Riverside.