Wait Till Your Father Gets Home (1972)

Harry Boyle, a mostly conservative businessman, has a son, Chet, and a daughter Alice. Chet is a hippie and Alice is sexually liberated. Harry's shrewd youngest son Jamie is often an ally, but Harry's wife Irma is a neutral in the ongoing generational war. Their paranoid reactionary neighbor, Ralph, prepares them for the oncoming takeover by the Communists.