There are some errors in this list.
Golden Corral in Tallahassee used to offer the senior discont, but not since a year or so ago. Don't know about other cities. Radio hams meet at the GC in Tallahassee for brunch at 10:30 each Friday. Y'all come.
Publix groceries in Florida do not offer senior discounts. In North Georgia they do. Don't know about other places.
Probably that's an old list, or was compiled by checking only in one city.