Basically, a finger food/ sandwich lunch. Cake and cookies. Iced tea, coffee.
For 50 people, the relish tray for 50-60 on the veggie tray page would be a nice choice. About 60 sandwiches, cut in halves or fingers. A fruit tray, such as 1/2 the hundred or twice the 25 on the fruit tray page. Maybe some deviled eggs.
2-3 9x13 cakes or 2 layer cakes, a nice assortment of cookies.
If in a home, the meal can be expanded- fried chicken, macaroni or potato salad or casseroles, etc
What I avoid are green salads, soups and most things requiring a fork.