I'm all for the smoking ban. This state introduced one last December. After giving a month to let residual smoke begin to clear out, I finally checked out some bars that had a reputation as nice but smoke-filled.
The state's smoking ban also prohibits smoking within 25 ft. of an entryway to a building that is open to the public. In some cases, particularly health clinics and schools, windows fall under the classification of "entryway". However, I've seen little enforcement of this part of the ban. There are numerous piles of cigarette butts just a couple of feet away from many, many doors. A 25 ft. radius would effectively eliminate smoking in many sections of Seattle but, due to the lack of enforcement, I don't see that happening.