Bicycle tour will give you all of that.We want to have a good time, see some of the local sights and partake in some light refreshments, probably alcoholic and no doubt a bite to eat at lunchtime.
Fat Tire Tours - Berlin City Bike Tour is the one I did a few months ago and highly recommended. Think it was from 1pm-5pm. Berlin is flat so cycling is fun. The bikes are comfy too. You get to see ALL the important places, the guide was full of knowledge, and half way you stop off at a local German restaurant in the middle of a park to grab some German food and beer.
It was perfect as got to see everything we wanted in a day and had fun doing it. Seriously, this is what you should do.