If there is one major take-away that I have learned from my 10 years of experience as a user of Professional's Networked Community (PNC) platforms... It's that the ability to spin off, or spawn, a group or sub-groups is a feature that few social media sites possess, nor do well, if they do have the capability. IPS has done quite well with their quick provisioning functionality. Perhaps one minor suggestion is to be thinking about the next generation of these "Club" pseudonyms:
I educate new users by directing them to Communities-of-interest or Communities-of-Practice. Under these two basic community segments we can harness cohorts such as the following based on your site's business and community growth objectives:
Industry Cluster - Businesses collaborate using similar or common business models which are determined by an NAICS or SIC code. This allows them to share industry benchmarking data.
Executive Think Tanks (ETTs)
Special Interest Groups (SIGs)
Bird's-of-a-feather (BOFs)
Thanks for your interest in IPS "Clubs" feature!
Phil