The Right of Association

Mr. Bradley Birzer gives a communitarian explanation on the right of association, one that can be harmonized with CST on solidarity and subsidiarity (and the value of lower-level associations): The Right to Association: Fundamentally and Naturally American

How would he deal, then, with the understanding of the right of association offered by libertarians, in which the right is defined first through commercial transactions and the voluntary nature of such associations is (over-)emphasized? As a result of the emphasis on the voluntary, the right to association is also defined negatively by libertarians as the right not to associate with people. How much interaction is necessary between individuals who at odds on fundamental moral issues?