Put your foot down, firm. No conversation.
It is just these kinds of people that weaken and bring others to SIN. See this people as an occasion of sin. I work! If you think best, keep a diary, IF they don't follow your command, I don't go there.
I had a job where a "coven" of witches from the TOP down. I wore my Miraculous medal, scapular and rosary in my pocket. I would even suggest sprinkle your area with holy water. I had one witch ask me "who are you"? They found me out and I found them out. And I minded my business. You go to work and you go home. Those who were Christian, per se, knew I was and they were most happy with me and I was looked up to, per se. So, be firm and hold your ground, as they say! Hold your faith and hold your head high!