Jesus, how old are you ? My parents are in their 80s, grew up in St. Louis and never saw a sign like that.I understand I'm mixing apples and oranges, but for those older than I, does anyone remember "Whites only" drinking fountains. I remember traveling the south as a kid and seeing the faded remnants of signs. 
On the other hand, I'm of two minds about this. If I want to open a bar that only serves, straight, white, left-handed, one eyed, men, of French-Canadian ancestry, Then I have every right to be stupid and go bankrupt.
You can damn sure bet that if the shoe was on the other foot they would be crying like a lost lamb. Personally, it makes my day that Suzannah Van Rooy got shown the door, then I'm easily entertained.
faded remnants are the key words.
I guess it depends on where you grew up. I'm 70, grew up in Memphis and I do remember separate "White" & "Colored" water fountains as well as separate bathrooms and building entrances and a black person would never, ever mouth off to a white person.
That was outlawed in 1964. I asked my mom this morning if she remembered that stuff and she said yes. And much worse.
I remember going to Alabama for a great uncles funeral in 1959 (I was 8). The signs WERE there and they were rules that were followed. I remember a restaurant where the seating areas were segregated (white folks inside in the A/C, black folks outside at picnic tables). Even as a little kid it was obvious that that was wrong. I still can not understand why people (ALL groups of people) can’t treat each other with respect and consideration. I frankly could care LESS what color your hide is-a decent person is a decent person, and an A—hole is an A—hole (and ALL groups have a few
). I don’t like jerks, thugs and A—holes whatever their race or “ethnicity”.
As a kid raised in Texas in the 50's those signs were everywhere. Grocery stores made black folks enter backdoors to shop, same thing in restaurants and many other places.
I'm not afraid to criticize it now. I know in 4 years your side will try to get in power again. And at some point, your side will. And then it will truly be over. That's why I still believe in this.