[stirno]

Obviously not PG, but I do have an opinion so here we go.. ;)

It entirely depends on the image you're looking to present for yourself. If you are comfortable with being a smoker and people judging you and your company by that, then by all means continue.

There are some that will judge you poorly in any circle but a majority likely will not care.

My only advice is don't look to others/the culture to justify a behavior. In the end it has to be your decision and you have to own it. I think most people would be surprised by the number of their peers who have made this choice.