Dining programs offer an easy way to boost your points and miles by earning rewards for restaurant spending in addition to what you earn from the credit card you use to pay the bill. (thepointsguy.com)
If you put $ 5,000 worth of restaurant spend on your card, that would be a nice way to be rewarded on top of the 4 % you'd be getting back. (uponarriving.com)
For this reason, cities with higher restaurant spending per person were favored. (creditdonkey.com)