In the 70’s, we used to call that part of the song the “dump”. Not exactly sure why, but that’s what we did. Listen to “Forget Me Nots” by Patrice Rushin. In the middle it just breaks down(breakdown was another term) into a bass and drum riff that had nothing to do with the rest of the tune. Perhaps to just give some more beats to dance to. I don’t know why, but it was just accepted as what you would do as part of the song.
