British Institute of Professional Photography
Probably the most respected professional photography association, of which I am a member. Incorporates many useful guides in respect of photography. http://www.bipp.com
Cream
Although no longer weekly in Liverpool, still one of the top "superclubs" in the north. http://www.cream.co.uk
L3xion.com
A web thesaurus and lexicon listing paulharness.freeserve.co.uk under photography, commercial and yorkshire http://www.l3xion.com