It's a romantic comedy for teens. It's one of the better ones I've read, though. So, there's some kissing(and more), talk about sex, and a strip club with strippers dressed like nuns. Also, there are a couple characters who regularly get drunk and hook up with whoever. Nick's band is underage but they play in a bar and drink alcohol. Don't forget the constant swearing, but its what kids hear at school every day.
Nick and Norah's Infinite Playlist is a mediocre story packed with drinks, making out, oral sex, abusive boyfriends, and reckless behavior. Not the sort of stuff you'd want your teen emulating. On the bright side, it's slightly more creative that the junk most teens read.
This is a hilarious book, but it has some adult situations...namely lots of frank sex talk and a scene in a gay..."bar". A very interesting read overall.
I agree with what many others have said, that the book is not appropriate for some teens and teens who are not okay or used to the language/sex/drugs used throughout this book. However, in my opinion most of this stuff I see and hear every day at school. The language or inappropriateness was not a turn off for me, as it accurately depicts what things are like for most older teens.