Every time there is a movie set in Chicago (at least back in the day), they seemed to have always included a softball game scene where they are using some sort of squishy ball.
https://www.youtube.com/watch?v=2LFjvkDnwZA
3 minutes in on this one, the background players are warming up...
https://www.youtube.com/watch?v=YArFtPW98qg
(Whoops! I see Bob already mentioned the Chicago angle.)