First off, set up events of the people eating around the table (Except the hero, he'll teleport there later), and set their precondition to a switched called "Starting Dinner" or something.
Hide Screen, turn on the "Starting Dinner" switch, teleport to the table, show screen, commence dinner sequence.
Jonesy's way would work too, it's all a matter of preference. Anything to turn the screen black, really.