On Monday, 9 May 2016 at 15:12:25 UTC, krzaq wrote:
It's not just the distance, but also the overall personal cost of attending the conference. Berlin is, all things considered, a fairly cheap city. London is a big NO in this regard, can't speak about the other suggestions.
I don't know what Berlin's like, but I just visited London for a long weekend and it wasn't so bad compared to where I live (NYC). I used AirBnB and my room was like $90 a night.