They sold a whole range of cocktails made with (the real) Berliner Weisse.(If you look below, you'll be pleased to read that it's open again).
If you want to get an idea of what drinking was like in East Berlin before the wall was breached, take a glance at an article I wrote in 1989: Get Weisse behind the wall: A guide to pubs in East Berlin. To be more positive, beers from old DDR breweries have made a strong comeback in the eastern parts of Berlin.
The consumer's choice has been greatly augmented by the introduction of Czech dark lagers on draught.
On the more subjective matter of taste, the Berliner Weisse brewed by the VEB Schultheiss Brauerei Schnhauser Allee (Abt.
Weissbier) was the classic version of the beer, unfiltered, unpasteurised, uncompromising in its flavour, and definitely far superior to its western counterpart.
Expect a few more details about the event after my return.
How to get there: U-Bahn line 5 from Alexanderplatz to Strausberger Platz, Weberwiese or Frankfurter Tor U-bahn station.
The closure, in the 1990's, of the brewery which produced it was a tragedy for beer lovers.
It had also been the first home of the revived Leipziger Gose, when the style was brewed again in the mid-80's after a 20-year break.
A beer brewed with a hybrid yeast/lactic acid bacteria fermentation, it has a delicious and refreshing sourness unique in Germany (with the exception of Leipziger Gose).
It can be difficult to appreciate for those not used to sour beers. To disguise the challenging acidity, it's often drunk with a dash of syrup, which leaves it bright green (with woodruff) or red (raspberry).
During its heyday as the capital of the German Empire, Berlin was home to some of the country's largest and most influential brewers.