Surely I am not the only one who finds the Alte Nationalgalerie cafe on Museumsinsel a bit – ridiculous? (No sooner is the question framed than googled: "Der Tiefpunkt der Berliner Museumsgastronomie ist wohl eindeutig die kümmerliche Espresso-Ecke der Alten Nationalgalerie" writes Berlin Ist.)

The coffee's fine, of course...

Alte Nationalgalerie, Bodestr. 1-3 (map)
Open Tues-Sun 10 am to 6 pm (Wednesdays till 10 pm)