I'm going to be in Berlin for 2 days and fancy exploring by bike; not a great fan of being stuck in museums/exhibitions and endlessly hopping on/off trains and buses, so just want to take-in as much as possible (poss with some planned routes). Spotted the usual 'Boris Bike' style schemes but are there any recommendations? Just need a reasonable urban/hybrid style bike; the 'Boris bike' style ones always look a bit heavy-duty. Need to keep the whole process simple to make the most of the 2 days. Spotted organised bike tours but guess you can get a map and 'DIY'?