I was visiting Amsterdam with my partner and we really wanted to find something a bit different, a bit off the beaten track, and we are so glad we did. We saw a show in a crazy round theatre in a place where you would never expect to find one. For the ticket price we got three shows, but the middle one had us in tears. It was a show called The Play and was just a ludicrous farce. I have to give a particular shout out to Steven Morgan, the scrum master dressed all in white. My partner works as a scrum master so this ridiculous character was just extra funny to us.
I don't think this is an obvious thing to do when visiting Amsterdam, but I recommend it a lot.