Here's a thought (powerful strong coffee this morning) - remains of food on plate, used cutlery, used wine-glass, chair pulled out at an angle where the diner has left. On the opposite side of the table an unused plate, cutlery, napkin etc.. Perhaps an engagement ring box by the used plate, for additional poignancy. Though, looking at it again, it is more subtly lonely and sad as it is. Forget I spoke.......