What is the academic term for political activities on the small social group level?

We have the phrases "office politics", "family politics", etc, describing relations of power, that is, political relations within small social groups.

Political relations on this level are no less important and no less complex than relations on the a national state or international relations level. I cannot find an academic term for that, though.

The expressions mentioned above are colloquial and cannot serve serious academic purposes. What is/are the proper academic terms for that kind of political relations?

(For a while I thought the proper term would be "micropolitics", but as I researched it, it seems to lack solid definition in academia. My other question on that topic: What is the generally accepted definition for "micropolitics"?).