One of the best parts of going into the office is free food and drinks. I'm not saying that sitting next to your colleagues and doing work simultaneously is totally worthless, but you could work next to other people at any public library during working hours. Sure, you can go into a meeting room to pick your coworker's brains, but that's a rare, thrilling moment. It's much more exciting to get a free lunch or unlimited cans of Diet Coke for your pleasure. You're probably not getting paid enough anyway, so you might as well utilize the resources your office has to offer, paltry though they may be!
What happens when the paltry free offerings go away? That's what happened to one office when their boss got rid of the free coffee machines in exchange for an in-house coffee shop. Who gets rid of a coffee machine? An absolute villain.