Can Private Entities Censor Speech In The U.S. Without Violating The First Amendment?

A parishioner can flip off a pastor in church, and that’s protected free speech. What if you’re an employee, though? “In bars and parlors across the country, the issue of the flag and the anthem are being aired—and one massive misconception is that, because the players are private employees performing in a private venue, the First Amendment doesn’t apply to their protest.”