One of the Big Deals of the 70s films we’d later refer to as the New Hollywood was their use of contemporary music, as opposed to a scripted score or relying on the classics. These choices could comment on the things happening on the screen, underline them, or invert them: Robert DeNiro’s entrance in Martin Scorcese’s Mean Streets to the Rolling Stones’ “Jumping Jack Flash” manages to do all three at once.
Yes, three “Song for a Sunday” features and two of them are Robert Altman films. (Wait until we get to Nashville!) The only connecting thread in these is that I like them and think the songs are used well in the movie, and Altman definitely knows how to deploy songs to structure the plot and mood.