Shampoo (1975)

In this farcical satire of 60s sexual practices, Warren Beatty is a hairdresser who simply can't resist the women he glamorizes. They can't resist him either, and unfortunately they are all linked somehow. Beatty's freewheeling and funny escapades with three of his lovers culminate in an election night party (Nixon wins) which all three attend, along with another older, richer man who is married to one of Beatty's conspirators, and whom Beatty happens to be soliciting for startup funds for his own beauty business. At the party, all three women desperately want Beatty's attention, and the resulting debacle causes him to reconsider his lifestyle.