Makes ya wonder how they turn any kind of a profit. I would take it home too.
If on the road, I always ask the wait person if there's a well-deserving cat out back - anything to give the hint that it should not go to waste.

If there's a microwave in my room, I'll give it a reheat in the am and chow down while SO is in the shower.

Usually, tho I can finish anything put in front of me, and then just wait for that dumb question "Are you finished?" Yes, I realize they are trained to ask, but gee - when I've 'licked the platter' clean....

I have a resto question for another thread.