http://bitcoinmagazine.com/6487/bitcoin-in-berlin/"Over the past two years, Berlin has gained a reputation as one of the Bitcoin capitals of the world."
"The most recent meetup on August 1 saw unusually high attendance, with a number of prominent Bitcoin activists from Europe and around the world attending; stateless political activist Mike Gogulski, Defense Disributed‘s Cody Wilson, Bitcoin developer Amir Taaki, bitcoin.de operator Oliver Flaskamper and Mihai Alisie and myself from Bitcoin Magazine were all present."
"there is no other city in the world with even ten Bitcoin-accepting locations, with second place perhaps going to San Francisco with around five. Berlin is thus pretty much the only city in the world where one can live entirely on Bitcoin without relying on an established support network, and enjoy the experience."