Hi, Tamar,
In Boston and NJ, they held them at the MS offices. Philly was at that business/community college (I forget the name of it, it's the one right off 676).
I think it's mainly pizza and soda. If memory serves, they brought in a bunch of the 2-liter bottles of soda. Funny story: in Boston, they ordered 200 pizzas - all with no toppings!
Kevin