nothing. civil rights are in effect. if you refuse to serve me due to any of the factors that civil rights precludes, i would probably know. i do my research and shop at places i know.
the only grocery store that ever refused to serve me was when they refused to sell me beer because i went in there so stoned that they thought i was drunk. can't sell alcohol to the drunk, so they refused me.
if, like many people were pre-1964, i was refused service due to the color of my skin at a hotel, lunch counter, construction supplies store, or anywhere else, i would petition the government for a redress of grievances. that is what happened. it worked.
you describe the issue inaccurately as well. you say...
the fed having the power to control your business and private property
...and that is not true. the fed does tell you everything you may or may not do, they tell you what you CAN NOT do. it is not a destruction of freedom, it is an abridgement. the first amendment is abridged as well. most rights are, and deservingly so.
in any case, it is hilarious watching intelligent people like yourself defend ron paul's stance on the issue. i LOL all the time.