Well, there's soc.org.service-clubs.misc, of course. :)

There is an alt.org.jaycees newsgroup.

dhartung@MCS.COM (Daniel Hartung) has mentioned he's working on an RFD
(i.e. proposal) to create soc.org.service-clubs.rotary along with Kate
Wrightson (at University of Georgia). [July 24, 1995]

Some of the discussion on the newsgroup soc.org.nonprofit will
probably be of interest to those who help run service clubs, which are
usually organized as non-profits.

Irwin Taranto should be periodically posting the following article:
	Newsgroups: soc.org.service-clubs.misc
	From: irwin@taranto.com (irwin taranto)
	Subject: Rotary FAQ
[Expect to see me start leaving out some of the more rapidly changing
information about Rotary --- e.g., URL pointers --- when I become
convinced that Irwin will be continuing to post his article indefinitely.]