Just until recently this place used to be one big old Aphoteke (Pharmacy). They have kept the Apotheke's  dark wood Art Deco charm to use in benefit of great coffee and fantastic brunch (try the french toast and you'll see I'm not lying). 

The Cô Cô bánh mì deli serves great vietnamese sandwiches and the best lemon grass tea I've ever had.

Besides being the friendliest shoemaker in town, he also offers quality for good value. 

Great place for Bulgogi and the original place of a small street food success story in Berlin. 

Wim Wenders shot Wings of Desire here. It's a quiet place to work and definitely a gorgeous place to visit. Combine it with a visit to the Philharmonic, just across the street. Affiliation is 30 euros per year and you have lots of desks all over the library to choose from.