This video by Streetfilms is a couple of years old now, but its worth watching. Simple idea, a bike coop, where people can go and learn to fix their bikes for free. Its great because knowledge of how to maintain a bike is a limiting factor for many people when considering cycling on a regular basis.
Cooking Up Bike Co-Ops in Los Angeles from Streetfilms on Vimeo.
Apart from being a learning experience for people, it's also great because people can save money. Paying for a bike service can be pretty expensive now days.
Looking at this, makes me feel like all my tools are going to waste, they mainly repair my bikes, they could be repairing lots of peoples bikes.