I tend to ask these questions often, such as "does you're group do X?"
well this is the same question, what does you're group eat?
Do you all bring you're own food?
Do you all do a pot-luck type thing?
Do you all pitch in money for snacks?
I could ask a question on a poll and get numbers, but hearing you talk about your answer is much more useful, as I am workin on starting a weekly RPG group, using this as a sort of "if we decide to do this..." thread.
So what would do you do for food during sessions?
Also...do you enforce rules of eating for the characters?