Comment Copenhagen system (Score 1) 37
The Copenhagen bike-share system is free with a deposit of a coin that's worth about $5, which unlocks the bike, and you get your coin back when you relock it to a bikeshare rack. As the tourist guidebooks say, if you don't want to go to the trouble of returning your bike to the rack, a local bum will happily do it for you. (Ifound this to be correct, even when "not returning the bike" meant "hiding it in the shadows behind the store I was popping in to" - there wasn't a bikeshare rack nearby.)