Complex sentence: The guests actually did eat lunch during the show--during musical interludes--though the hosts did not, resulting in one of the show's hallmark elements: the sounds of plates and cutlery clacking in the background.
Split into simpler sentences: The guests actually did eat lunch during the show--during musical interludes--though the hosts did not. Nonetheless, the presence of other diners at the restaurant gave the show one of its hallmark elements: the sounds of plates and cutlery clacking in the background.