There seems to be logical explanations for all of these...Pizza is the cheapest food to feed a large group of people. Caffeine is a stimulant that makes people

There seems to be logical explanations for all of these...Pizza is the cheapest food to feed a large group of people. Caffeine is a stimulant that makes people work longer and harder. Free beer is a good way to draw people to an event and it makes conversation flow more easily among participants.