Bicing, Barcelona's Bike Sharing System

Renting bikes is definitely one of the most successful PSSs (Product Service Systems - access over ownership) in Europe.

With 1500 bicycles and 100 stations, connecting other public transport stations such as metro, train, buses and major car parks, the red and white bikes are to be seen all over town.
30 000 people subscribed to the service online in the first 2 months. (Treehugger)