Peter, Fons, Alaun,
Thanks for the comments.
Peter,
I did take another shot but because it was cold, the subject was moving about, and kept turning away from my line of sight, so the cigarette wasn't always visible.
When he finally did face in my direction and take a drag, while his "pose" was the best, the woman was in the background. Figuring this was my best opportunity, I grabbed the shot.
The depth of field being what it is, she isn't in sharp focus, so her presence in the background doesn't bother me, and cropping her out means losing the "Smoke-free" sign, so I left her in.
Robert