What to do when the cafeteria is closed and you didn't drive to work

Since today is the last work day before new years, our cafeteria is closed down. I left in quite a rush this morning and didn't consider this. Normally I'd group up with some other co-workers for lunch but once again it's the last day before new years so no one is here :(. Luckily our vending machine is pretty good so I'll have a decent lunch (albeit quite granola with just a power bar and trail mix).