I'm sure being "ancient" is a factor, but find that amount of food served in a restaurant is WAY more than I'm gonna eat at one sitting. I don't hesitate to have what I dont finish boxed up to go.
Back in June, joined brother and his family at the NJ shore for the day and we went out to a local/family place. I had fried flounder... hunka fish could EASILY have fed 2. Baked potato was MASSIVE... only ate half. When I asked to have left-overs boxed up, think I shamed SIL and her mother into doing the same?? One had 2-3 big fried shrimp and other had 2-3 fried scallops left on plate. I KNOW them well enought to just say... ya KNOW you're NOT really gonna EAT that tomorrow!?! Came home with lunch/dinner for next day... and not one shred of guilt!
Used to be a Victoria's Station in King of Prussia, PA... specialty was prime rib. Ranged from a boneless cut (probably a good 8ounces) to TWO bones (like from that scene in Uncle Buck!!). We'd come home with LOTS of stuff for dogs that dined on prime rib scraps... we'd reroast the MEATY bone, slather with BBQ sauce, and munch away the next day.
Are you a DB person??