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London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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@Björn
http://www.youtube.com/watch?v=S7y3qIQu3Gc
http://web.mit.edu/press/2009/copenhagen-wheel.html
http://www.youtube.com/watch?v=l9_XEgGQBkQ
http://www.inhabitat.com/2009/08/05/contortionist-foliding-bike-rolls-up-smaller-than-a-wheel/