This gave me a bit of a shock.. do you really have no ads in your cinemans in the US? Here in Australia I pay much the same as you do (in $AU) to get in, and there are generally about 10-15 minutes of ads before a movie starts. Then there are the trailers for upcoming movies, which I don't mind so much.
When Lord of the Rings came out, there were 25 minutes of ads before the film actually started. I considered complaining to the manager, but I didn't.. there were more than I expected, but ads of themselves are the norm.
Can people reply back telling me if they have ads before their movies, and what country / cinema chain it is? It woudl be interesting to find out if this is a very commmon thing.. and can someone verify that you don't have ads before a movie in the US?