This chap is a legend. He rides his trike all over the city every day, visiting a long line of cafés and bars.
He sells nature stamps - not postage, just decoration for your envelopes - to support a charity... can't remember which.
Everyone I know has had the plastic folders with nature stamps in them thrust towards them while in town.
Such a dedicated chap. He rides 30 or kilometres a day to a rotating list of cafés and bars.