A friend of mine and his ex were fighting in a Cici's pizza (she was doing most of it, just bitching) and it was gaining lots of looks from the crowd in there. He looked across the table at me and said "should I do it?" I just smiled and shrugged my shoulders. He slapped the HELL out of her... with a slice of pizza!!! I hit the ground laughing, there was a round of applause and cheering in the place, and she had a blank, jaw dropped stare for a few seconds, wiped the toppings and cheese from her face, collected herself, and quietly got up and left.
The best part was the next day she was extremely apologetic to him and begged him to stay with her. Maybe I should use food to end the occasional fight? Seems to shut them up right quick!