Think of this a different way.
You are in a theater/restaurant/ or you you case, gay bar.
Idiot wants to shoot people, sure the first guy may go down, but the other people carrying guns sure as hell aren't going to let him just sit there are pick them off. It's about avoiding as much loss of life as possible. I can't imagine anyone I know not at least trying...
Place a CCW holder in that theater in aurora. I can't imagine anyone not at least trying? I mean, if this guy is going off shooting everyone he can, It's worth a chance to try and stop him from doing anymore harm.
The more law abiding gun carrying people the better. If I had a business, I'd give them a fucking discount to encourage their patronage. It's like a free security detail that might save the life of a customer or your own.
MEH, done ranting now.