African American Wine Tasting Society, Inc.
   Non-profit club offers monthly tastings. Includes event listings, a newsletter [PDF format], and membership details, and information about starting a local chapter.
   http://aawts.org/

American Wine Society
   Non-profit consumer group devoted to education on all aspects of wine. Includes lists of programs, events, and publications.
   http://www.americanwinesociety.com/

Brotherhood Of The Knights Of The Vine
   Association of individuals with an interest in the vines and wines of America. Includes a clickable map of active chapters, historical background, and membership information.
   http://www.kov.org/

Free The Grapes!
   Coalition of consumers and winemakers promoting interstate direct shipping. Includes news, articles and membership information.
   http://www.freethegrapes.org/

German Wine Society
   Association of fans of German wines. Includes informational articles, maps, an event calendar, and membership details.
   http://www.germanwinesociety.org/

Grape Lakes Wine Appreciation Guild
   Club of enthusiasts offers their tasting notes, trip reports, and winery links.
   http://www.grapelakes.com/

International Wine Society
   Subgroup of the Club Managers Association of America, promoting education and appreciation. Includes membership and event information, along with a description of how to host a wine dinner.
   http://www.cmaa.org/winesoc/

International Wine and Food Society
   Independent association of gastronomic enthusiasts, with branches in thirty countries. Includes information about the society and its worldwide activities.
   http://www.iwfs.com/

Les Chevaliers Du Grand Vin Wine Society
   International non-profit club promoting education and enjoyment. Includes information about events and membership.
   http://www.winesociety.us/winecell/society.htm

Organic Grapes into Wine Alliance
   Association of producers and distributors of organic grapes and wines. Includes information about the wines, production standards, and membership.
   http://www.organicwine.com/

Professional Friends of Wine
   Association of professionals in the wine and restaurant industries, dedicated to increasing wine appreciation. Includes informational articles, tasting notes, and recommended links and books.
   http://www.winepros.org/

Rhone Rangers
   Non-profit, educational group of consumers and professionals, dedicated to American-grown Rhone grape varieties. Includes information about wines, winery profiles, event calendar, links and membership information.
   http://www.rhonerangers.org/

The Informer
   Dedicated to informing the membership and the public about the American Wine Society.
   http://home.earthlink.net/~awsjim/

The Meritage Association
   Information about the blends made by the association's member wineries.
   http://www.meritagewine.org/

Thomas Jefferson Wine and Food Society
   Wine reviews, tips, recipes and free subscription to wine newsletter with selections from wine expert Jim Gabler.
   http://www.thomasjefferson.net/

Wine Brats
   Non-profit group of enthusiasts dedicated to demystifying wine. Includes educational articles, membership information, and event listings and tickets.
   http://www.winebrats.org/

Wine Institute
   Association of California wineries supporting political advocacy, market development, media relations, research, and education. Includes industry news, legal information, and extensive wine-related links.
   http://www.wineinstitute.org/

Women For Winesense
   Non-profit educational society promoting responsible enjoyment of wine. Includes descriptions of the society and sponsored programs, membership information, and a list of chapters.
   http://www.womenforwinesense.org/