Since the smoking ban in the UK was introduced in July it seems that the health of workers in the hospitality industry (that's "bar staff" to you and me) is more at risk, not less.
According to this article on The Caterer Blog over 10% of workers have suffered threats or actual violence after asking customers to stop smoking:
More disturbing are the personal testimonies given to Caterer.com about customers idiosyncratic behaviour when asked to stop smoking.“When I told him to put his cigarette out, he pulled down his pants and started masturbating in front of me.”
And so it goes on...