Complex sentence: The town had not been a scheduled stop, but the tour promoters, hoping to fill an open date, called the manager of the local Surf Ballroom, Carroll Anderson (1920-2006), and offered him the show.
Split into simpler sentences: The town had not been a scheduled stop, but the tour promoters hoped to fill an open date. They called Carroll Anderson (1920-2006), the manager of the local Surf Ballroom, and offered him the show.