Back in the 1950s, some lunch counter owners said that they did not want to serve Negroes. "It's my business, and I can serve who I want." Society made the decision then that collective rights of some privileged classes were more important than property rights of individual business owners. It was a mistake.
It's a dumb business decision to say "I don't serve your kind" but in a society which values property, it is an essential right to say exactly that.
I suspect that if anti discrimination laws were overturned minority owned businesses that discriminate would blossom and thrive far better than white owned racist businesses. The left simply cannot allow the world to see that.
In my personal opinion it would be a good thing because it would be good for the economy. As it is now, its doing more harm than good for minorities.
Actually, I think there were state laws requiring segregation. It was not up to the lunch counter. But, I could be wrong.
There is one thing very different here. Black people are not doing anything wrong and should be treated as anybody else. Homosexuals are people doing something wrong. You have no moral obligation to serve them at all. People who include homosexuals as a minority are twisting things way out of proportion.