Thank you, I had a bit of a feeling this might be some kind of marketing ploy.
I guess I'm more used to the classical Hackerspace (of which there are quite a few in Berlin [1]), but I appreciate that you are doing mentoring and imparting best practices.
I think 'hacker retreat' gives a bit of the wrong vibe as it sounds more like a place for social gathering (aka a hackerspace) when in fact it's more in the spirit of e.g Games Academy (especially considering the price).
[1] http://hackerspaces.org/wiki/Berlin