The most over the top DB experience I've had was a few years back at Maggiano's, a small chain of Italian places that is (in)famous for its portions. If you're a party of 4 or more it is typical to eat "family style" - that is you pick a salad, a couple of apps, a couple of sides and a couple of entrees and the food comes out on platters and in bowls. You then pass the food like you were in someone's home. Supposedly if you run out of something they'll bring more although I've never seen it happen.
Well we were finishing and someone called for the check. At the same time, without prompting, another server starts boxing all of this uneaten food. Now I don't think anyone would dare ask for a box at what is essentially a buffet but I guess it happens...and because of the way they serve it they can't give it to another table. I guess some smart server (tip$) decided if she proavtively started boxing it removed the stigma.
In this case, I was the only one who lived in town and could refrigerate this stuff. I literally had a week's worth of leftovers