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).
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)