Cycle Clubs

I only have one bike and it's fixed. Are there any clubs out there that will take me under their wing/not call me a prick behind my back? I'm worried (probably too strong a word -- you know what I mean though) that my lack of gears/leg power for climbing hills will leave me struggling for choice when it comes to finding suitable clubs/rides.

I'm in the same boat, only on the opposite side of London, anyone got any suggestions for a good West London CC?