Affinity group

An affinity group is a group formed around a shared interest or common goal, to which individuals formally or informally belong. Affinity groups are generally precluded from being under the aegis of any governmental agency, and their purposes must be primarily non-commercial. Examples of affinity groups include private social clubs, fraternities, writing or reading circles, hobby clubs, and groups engaged in political activism. Some affinity groups are organized in a non-hierarchical manner, often using consensus decision making, and are frequently made up of trusted friends.