Dinner party hell

Michelle🐶 • 8 angel babies, now divorced but still hopeful for my first human child - already have my pitbull fur baby!!
Halloween is right around the corner and this year we are throwing a costume dinner party. The theme is a haunted asylum/hospital. I am thinking the menu should be "cafeteria" based, almost like what they would serve in a hospital. I am thinking of what recipies I can do and I'm a bit stuck. Mac and cheese? Sandwitches? 
What do you ladies think? What other foods would be good for an asylum themed dinner party? We have about 20-25 people.