Skyfall
Brisbane, Australia.
100% fully packed.
From a look around, I'd say about about 75% of the people in there were over 30. Of that, about 80% were men.
Trailers:
Zero Dark Thirty: I think a minority of the crowd thought the film looked a bit corny as a select few were giggling, but the trailer mostly provoked some talking and "that looks good" reactions.
Les Miserables: The crowd seemed interested, and it provoked whispers as far as 20 seconds in to the next trailer shown.
Jack Reacher: The crowd also seemed to like this one, and the little bit towards the start of the trailer in which Tom blends in with the crowd provoked quite a few laughs. Heard some whispers, and one guy I overheard saying "it's funny how he's a good actor in movies then is a prick in real life."
Flight: Great reaction, lots of talking and one guy shouted "yeah Denzel!!!"
As for Skyfall, the crowd thoroughly enjoyed it. People were laughing out loud in the funny bits, and some people were even gasping in relief in some edge-of-seat bits. When the credits started rolling, there was a standing ovation from about 70% of the people, which is rare for a movie at this cinema. (I regularly go here, only seen that happen twice now)