Good point about boudaries Cyranoak, and they must be adhered to.
This may sound trivial, but my partner often tries to cover up the smell of drink with chewing gum. I made a rule a while back that she should not chew gum in our shop-sometimes the place reeked of it. Whether she is drinking or not it makes me uncomfortable, so today when I walked in I pointed out the smell, and our agreement. She protested that it was just anti smoking stuff-I calmly told her it's all the same to me-just don't do it. People have left the premises in the past because of the smell (alcohol plus overpowering gum)