Amsterdamn is a really cool place. Lots of History and museums. Please keep in mind that Van Goh and Rembrandt were dutch and a good portion of there art and story are there.
And thend there is WWII, Ann Frank and all that stuff. Really, you can spend a week there and never even get close to the red light district. As for the Coffee shops, give me a break, you are going to one of the worlds great historic cities with art, architecture and shops and spend most of your time wasted?? Ever wonder where the term WASTED comes from??