I normally wouldn't do this myself, but I was with some family members and we decided on the fly to go to the movies, didn't really even know what was playing. We ended up seeing Lost in Translation. Terrible. The only movie in which my mom fell asleep and I wanted to walk out of. The only reason I didn't was because my dad was willing to give it until the end to improve. It didn't.
So, I learned my lesson. Do a little research before walking into the theater.