Pilgrim Naturists of New England - Social nudism group. Includes events calendar, membership information, and biweekly newsletter. - http://sunclad.com/pilgrim/
Boston Mycological Club - Mushroom group information, membership information, advice and taxonomic keys. - http://www.bostonmycologicalclub.org/
New England Herpetological Society - Provides education of members and the public to the value and care of reptiles and amphibians. - http://www.neherp.com/
Boston Ski & Sports Club - Organizing sports, social, and cultural events. Sign up for email lists. - http://www.bssc.com/