Facilitated or “structured” group

If you are thinking of running a facilitated/structured Social Anxiety group please see the following comprehensive guidance by a very experienced support group facilitator : Running a Social Anxiety structured support group.
Also consider the zoom based groups at https://walkthetalk.org.uk/find-a-group

Meetup or “social” group

If you are thinking of running a Meetup.com or social/support group please consider some of the issues written by the longstanding social activity based group at https://www.meetup.com/leadinglightsocial/. You can see a copy of their group rules at https://socialanxietyalliance.org.uk/example-rules-for-sa-meetup-groups/.
Also consider first joining some existing meetup groups – some based around online meets, some face to face, please see the “Meetup section” at Online Groups and Support.