Good points Dennis.
You might remember when you and I first talked waaay back, and you felt I needed a second access, I spoke with a local architect buddy who told me unless it was a bedroom in my basement, I did not need a second egress.
The contractor who will be building most of my HT (and is starting next week, BTW!! W00t!!) is the one who keep insisted I must have a second egress, regardless of the room type. Although I believe him to be incorrect, he does make some good points.
It is really a moot point for me, since I have always planned to have a second exit for a variety of reasons, safety being one of them; the ability to open the doors and turn on my whole-house fan to quickly ventilate the room another (my dog has gas problems nobody would believe!!!!!!!!!!).
-- Cain
PS
Interesting point about the Zoning/Commercial Theater issue, this never crossed my mind, but my Contractor may well have been thinking this exact same thing.
He asked me if I planned to have any "strangers" over to watch movies. I said "of course not, I do not invite strangers into my home.."