My family lived in the area when I was very young (Dad was in the Army) and he has often mentioned the Berlin nightclub/rave culture. This would have been very early 80s. I've spent time in Munchen as an adult, but haven't made it north yet.Berlin is famous for its no-holds-barred raves.
(My personal guess, formed in the 80'ies is that due to the city being mostly cutoff from any rural influence for a few decades, they developed a uniquely condensed city-culture there).