Frank Hearts Berlin
Even though the whole area around Weserstraße has lots of cafes and bars this one in a side street is one of the best ones. It's quite big, so getting a table is much more likely than in other places, but it does get crowded on the weekends. During the day it's a lovely cafe to have a coffee sitting in one of the window frame seats. At night it turns into a nice bar with good drinks and a relaxed and mixed crowd.