At my high school we have more than twice the amount of kids should so getting lunch in the first place is hard to do. But, on the other hand, I am influenced by my peers if they make up there mind. Like if they get a salad, I probably will too to not lose them in the line to get the food and it might be faster.
Second, the data you collect will guide your deliberations about the types of .... Your conditions and resources assessment should proceed with these two.