I'm my barn that I ran I smoked in the arena but to boarders who smoked I told them stomp the butt out until it falls apart and douse it with water then goes in the designated disposal pot lol. My last barn was very clean high end so smoking to to in and out was okay, it's hard to describe the set up but you where at large doors and little hazard. I didn't because it was such a nice place... I know how classy smoking is

. Some barns allow it but really should not unless you are in your car or far away at a designated area. Other then the obvious health and safety issue it STINKS and I smoke and I know how nasty it is ( not to steal the post but I'm trying to quit, anyone have any tips?)
What Stevenson said is great, very fair to everyone involved
Tell the BO it's an insurance problem and if your horse dies in a fire... There will be problems.