Too old to help you with night time party stuff but I was there this spring and did the daytime stuff, the Rjksmuseum (Rembrandt's Night Watch etc) and the Van Gogh Museum. Also took in the "Heineken Experience" tour of their brewery. The Heineken thing was a fun way to kill an hour or two. If you go you have to let us know how you did on the rugby goal kicking simulator. This 65 year man humbled the young Euro guys there by going 3 for 3. Channeled my inner Cole Netten.
We did not do the Anne Frank house. Not sure about January crowds but when we were there you needed to have tickets in advance with specific times. Figured it was just a house since we all knew the story well since we are baby boomers with WWII parents.
The canal boats tours are a standard feature of course. Just because it's city visitor wonky doesn't mean it's not worth it. You get a nice channel view of the city and is a nice option if it is raining (clear roofed boats) and does not take long.