Performing Arts Building may have periodic smoking on stage

As a non-answer, I would suggest maintaining the no smoking policy in full, and consider the use of prop cigarettes when they are called for by the script. I did a quick search online, and found several of these prop cigarettes that are designed specifically to look real on stage. Regarding the blower door based approach, it would probably require designating the entire theater space (seating and performance areas) as the smoking area, which although the owner would be free to disallow smoking by the audience, would be an odd distinction. Additionally, and depending on climate zone, there could be a huge energy penalty associated with the direct exhaust requirement for designated smoking areas of such a large volume. All that said, and although it was (I think) under v2.2, I believe there was a Las Vegas casino project that successfully met this prerequisite, while allowing smoking in the gambling area and having no physical barrier between the smoking area and the lobby. My guess is that whatever strategy (read: loophole) they used for this has long since been closed, but if you are hard pressed for a way to approach this, it could be worth a look.

Loophole closed, firmly.

I think the loophole was relative to the LEED project boundary. They excluded the smoking area from the LEED project. Now with the MPRs since LEED 2009 you need to include the whole building and can't gerrymander.I think Glen's answer was spot-on with regard to prop cigarettes. I don't think audiences these days are craving real cigarette smoke from their on-stage actors, either. A prop that doesn't quite smell like the real thing will be appreciated.