I had often heard of QBA, a Cuban bar/restaurant in Mitte, on Oranienburger Straße, very close to the S-bahn station. I recently went for a nice evening with friends.
They have an interesting cocktail menu, I first tried their Tropical Punch, fruity rhum-based cocktail to go with my beef and cheese nachos. Food menu looks nice, I really liked the nachos de picadillo, quite huge portion actually.
A band was playing live that evening, as it often happens. Excellent latino music, along with an old Cuban rhum, perfect setting to warm up body and soul. Atmosphere is great, staff is very friendly, great service, prices are ok, a very good spot I might return to once in a while.