Ah, that reminds me. One thing I saw a couple of times in Berlin (but not, sadly, when I had my camera to hand) was cycling pubs. That is, some kind of covered float with a bar on it, where the customers sat facing the bar and pedalled while they drank, with a (presumably sober) staff member steering at the front. I'm guessing it was some kind of novelty service available for stag parties and the like. Wish I'd caught it on camera.