nell'uso italiano "social network" e' usato anche nel senso di social media.
Gruppo sociale, formale o informale.
A social network is a social structure made up of a set of social actors (such as individuals or organizations), sets of dyadic ties, and other social interactions between actors. The social network perspective provides a set of methods for analyzing the structure of whole social entities as well as a variety of theories explaining the patterns observed in these structures. The study of these structures uses social network analysis to identify local and global patterns, locate influential entities, and examine network dynamics.
cricca consorteria conventicola
noun: clique; plural noun: cliques
a small close-knit group of people who do not readily allow others to join
"his flat became a haven for a clique of young men of similar tastes"