Members
Run chapters, sections and committees on one structure.
Groups inside the membership, with their own rosters and their own officers.
Name a group the way your members name it
A state chapter, a practice section, a standing committee. One underlying structure, labelled in your association's own words rather than ours.
Answer who belongs to what, at any moment
Requests, invitations and approvals are tracked as states on the record. Membership of a group is a question the system can answer.