I live with two other guys. We each have chores. Are we a commune ? Or are we just housemates ? Does it matter ?
I think a commune is best defined according to the unique circumstances surrounding each gathered living situation. Some are, some aren't depending on who's there, is there a purpose? things like that I would guess are important to consider when defining your household / compound. I'm working to build a small commune, small because it's extreme and remote. So far we have 3, more or less may or may not come around with the same purposes, hard to say. I don't think size matters when it comes to communes. But I could totally be way off if there's some kind of commune rule book floating around out there somewhere.