I went to see this Friday night with a teacher friend of mine and three of our high school students walked in after us - lol. Other than them, though, the crowd was mostly 20 somethings. 
I put this movie in the brainless romantic comedy group. I enjoyed it, but it didn't require me to think at all. I did like Josh Duhamel, but I liked Topher Grace more. I've never really liked him before, so I did gain something while watching it -- a new item of interest