We had a party this weekend for my daughter who turned 18 and graduated from high school all in the same weekend. It started at 7pm and had about 35-40 people. I had big sub platters, a chick fil a nugget platter (the large one), a big platter of shrimp with cocktail sauce, fruit tray with fruit dip, veggie tray with dip, potato salad, spinach dip with crackers, cake, ice cream and a small candy display. Everything, and I do mean everything, was eaten. The only thing we had left was a few veggies, some ice cream and a little bit of cake but the cake was 3 tiers and there wasn' t a whole lot left. Everyone showed up hungry so I would plan on that for that time of day.
We had a great time and I hope you do too, OP!