I'm a member of Cycling Club Hackney:

http://www.cyclingclubhackney.co.uk/

We started last year. As we're supported by Hackney Council and the Learning Trust, we do a lot of youth development work. Club run (almost) every Sunday (waits for everyone). Winter turbo training on Wednesdays. Hoping to start entering road races this coming season. It's not in daccordi's area but if anyone else is interested, join us!