Kurt Andersen and the architecture team (and married couple) Robert Venturi and Denise Scott Brown talk about the difficulties and opportunities of making art together. A husband and wife in Kansas City pretend to break up on stage in Edward Albee’s The Goat or Who is Sylvia. In London, we visit the British artists Gilbert & George — who’ve been making art together since 1967. And the indie-rock band Yo La Tengo (whose nucleus is the married couple Ira Kaplan and Georgia Hubley) performs for us in the studio.