Karen:

My recollection is that the concert followed an early dinner on the ship. Before the concert, waiters served drinks and snacks were available on tables set up near the seating area. After the concert, waiters served champagne. The concert took place shortly after sunset with a beautiful area of the ruins illuminated in the background.

The excursion is moderately expensive but worth it if you enjoy classical chamber music in an exquisite setting.

Jim