> Something that always bugs me is restaurants that charge $2 or $5 surcharge for takeout. I'm saving the restaurant a ton of money by not using the dining room, why would they discourage that?

Because takeout isn't competing with the dining room. Customers don't go to a restaurant and then choose between those options; they've already planned whether to eat in or out. Restauraunts charge that because customers have shown they will pay it. Once you have that meal in mind, that $2 or $5 doesn't discourage you.