Yes i-love-polkadots, the first one was like this new one in Warsaw, the second one was in a huge old library in one of the most important ex-east avenues called "karl marx allee" very close from alexanderplatz, in a way for me the second one was not so guerrilla as the first one, i connect this temporary-destroyed spaces with the attitude of the gs, but in a way the second was too "build" (maybe because the furniture, a really wood-heavy designed kind of). The street where it was was amazing...i hope they will get a third one... have you never been in Berlin?