"We reserve the right to refuse service to anyone", was a sign that was before you were born. I remember traveling the South in the early sixties. All the eateries had a segregated window that said "colored" above it.
I don't think you have any idea of what they went through.
I had a black friend in the army who was a friend of Medgar Edwards and he told me a few stories about what it was like growing up in Cleveland, Tenn; where everybody with a pickup truck had guns in rifle racks and cb radios.
[ame=http://en.wikipedia.org/wiki/Medgar_Evers]Medgar Evers - Wikipedia, the free encyclopedia[/ame]