The first online community?
The Whole Earth 'Lectronic Link, normally shortened to "The WELL", was started in 1985.
It currently has about 4,000 members.
It is best known for its Internet forums, but also provides email, shell accounts, and web pages.
The discussion and topics on the WELL range from the deeply serious to the generally silly, depending on the nature and interests of the participants.
The Well is one of the oldest virtual communities in continuous operation.