I've been out to eat with people who do that - taking extra packages of ketchup, etc. at Wendy's.
But I'm going to expand on this a bit, even knowing the risk that this may go over like a lead balloon. There's one woman in our group that orders the cheapest thing on the menu and no matter how small her order is, she only eats half, then takes the other half home, in her words, "for the next day." I just won't do that. Once I've eaten off something, it has bacteria on it, then I'm taking it home so the germs can grow? No. If I don't want it all, I just leave what's left.
I'm bad about that like your friend. I tend to get filled up on the breads and salads that usually comes with a meal, I get full and end up taking my main meal home because I don't want to obviously waste it. Also...the main meal is what the costly part of the meal is. It's a bad habit, but I love bread and salad. The next response would be to just order a salad and bread which would be much cheaper anyway, my response would be that I actually go out to eat the main course because it's usually something I wouldn't fix at home.


