I finally remembered to watch the interview that Brian posted (thanks for the link, Brian). Just over halfway through Tom mentions that he does 'Trouble' from 'The Music Man' as a duet with John. For those of you that don't know, the movie version of 'The Music Man' was filmed in Hazzard Square, aka. Warner Bros' Midwest Street. Here's a screengrab from just before
starts; on the left is the River City Bank (Boss's Bank), Jim Griffith's is where the barbers shop was, Ewart Dunlop (Staple and Fancy Groceries) takes the place of the Hazzard Theatre and finally the pool hall that causes all the 'Trouble' would become the pharmacy. The County Building, church and other familiar stores are also visible during the song.