3 links
International Correspondence of Corkscrew Addicts
bullworks.net
A group with a long history of corkscrew fixations.
Just For Openers
just-for-openers.org
Laid back organization, essentially no rules, no officers, everyone just does what is needed and gets on with the real business of the Club, collecting, trading, buying and selling…
The Canadian Corkscrew Collectors Club
corkscrewnet.com
International collectors club. Includes information on membership, newsletter, and annual meetings.