I can imagine a situation like: - Store has both a back-room toilet for staff only & show-room toilet for customers and initially allows the staff to use eithe

I can imagine a situation like: - Store has both a back-room toilet for staff only & show-room toilet for customers and initially allows the staff to use either. THe Show-room toilet is nicer than back-room toilet. - Store worries customers are put-off by staff in customer toilets. Perhaps some customers even complain. Perhaps some of those complaints are even specifically about visible minorities. - Store responds by asking visible minority staff not to use show-room toilet. I don't know whether that is what happened here, but it is a plausible pattern. Of course this is still inexcusable, classic discrimination.