Smoking......

[oligopoly]

To settle a debate:

My friend smokes cigarettes, but only at the weekend. Would you class people who smoke in this way as smokers or non-smokers?

Please support your answer with reasoning

Thanks

[Bangkok]

I gave up 18 months ago (just got a big increase in life insurance cover for the same premium, smug git me). 

However, I (other than for insurance purposes) consider myself as a smoker who does not smoke.  I am someone who is meant to smoke, and for a variety of reasons does not, and perhaps never will.  However, it's in my character