London's 'Bike Bus' initiative

Transport for London is promoting 'Cycling Fridays', "free group commuter rides, for a healthy and fun route to the office"

Sounds familiar!

There was a feature on the Radio 4 Today program this morning. For some pictures see:
http://news.bbc.co.uk/today/hi/today/newsid_8222000/8222523.stm

For the 5 min audio report:
http://news.bbc.co.uk/today/hi/today/newsid_8223000/8223912.stm

It's interesting to see how the presenter relaxes into it, enjoys the ride, and (to me at least) the social aspect is the where the real enjoyment for the cyclists comes from...but we know that already!