For the last few years I've been happy to champion the World Naked Bike Ride, the global protest against oil dependency.  It started in Vancouver and is now in over 70 cities in 20 countries worldwide.  London, UK has the largest ride with thousands of riders.  Visit the WNBR website for more information about the ride in your city.    Apart from enjoying the annual event itself, I participate by designing posters for Toronto and helping to update the Toronto wiki.   I've seen the Toronto ride double in size each year from a few brave riders to nearly 150 women and men in 2011.