A friend of mine, if he goes into a restaurant and sees a military man, or family, or group, he secretly gets them a 100% discount, with an extra tip to the waitress for being his partner in crime for bringing him their bill.
We were at the OMNI lounge in Chicago over the weekend when a young sailor in uniform was seated with his wife (or girlfriend) a few tables down. We asked our waitress to give us his bill and not tell him who did it. We can all give the young folks in uniform a “discount” without having to be a business owner. And yes I am retired USAF and enjoy the 10% discount at Lowes and Homo depot frequently.