For the most part, table service restaurants stopped doing take-out orders about 7-8 years ago when the Dining Plans were really at peak popularity. Common reasoning used was that guests would order carry-out from a TS restaurant and then expect to be charged only a Counter Service meal credit.
Whatever the case, it's pretty tough to get TS restaurants to fill a traditional to-go order. I've heard people claim that they will ask to be seated at a table, place an order, and immediately upon delivery ask that the food be boxed to-go. Not something I'd try, personally.