I kinda agree with David here... having a structured seperation between the clubs would divide us a good amount....
I don't see how it could work practically though. Maybe a list of the clubs you're a member of in your profile or something... but keeping them up to date would be kinda annoying, and regulating them whenever a new one should be added would be kinda time consuming.
I don't know, if anyone suggests a practical way of laying it out and doing it, and gets the rest of the member's support, we'll do it obviously... but right now it just doesn't seem very feasible.