Here is the use case:

We are a voluntary membership POA. So we would like to clearly show in the directory who is a paid member and who isn't. Show an icon in the directory entry for each member (not account) that is in a group (our current group is 2019 Paid Membership).

Mechanism:

Group has an icon assigned (or not). If assigned, it would display next to the individual's entry in the directory.

Alternate use cases:

Shows Board & Committee members

Show a group of people who are runners who might want to do a group run (this would be a hard one to administer at present - but if members could select membership in non-admin groups then people could self generate group membership. Social network-esque.

Show what subdivsion a member is in (based on groups assigned by admin on geography)