I recently joined the JIBS User Group Committee and enjoyed the recent meeting I attended. The group is very active, experienced at running events with members engaged with a range of professional issues. The group is looking for an additional Committee member, preferably from further education.
At the University of Greenwich we are involved in a number of collaborations with partner colleges and the partner colleges librarians group, meets regularly. After emailing them I've already had a response from a librarian at Greenwich Community College who would like to join the Committee which is a really good start.