As I left Denmark on the 29th and actually worked at IBM until the 31st of May, I brought my IBM laptop to be able to work from Barcelona. However I quickly found out that the IBM Virtual Private Network client (the "AT&T Client") was somehow blocked by the firewall in the lab. Drat! I spent the good part of a day looking for an internet-cafe or some wireless. I looked in the part of town I had been before, and where I thought there should be a good chance of finding some. However, I looked with no success. The Starbucks I knew did not have wifi, and maybe the ubiquity of wifi and net in hotels and hostels has killed the good old internet cafes. I didn't find them. And I decided not to go "war-walking".
At the end of the day, or maybe it was the next day, I walked around the UPF main campus, and I found a small internet cafe a couple of streets away. But they did not have wifi - or wired access for my laptop. The lady in the cafe knew where I could find a cafe with wifi, though. And she managed to explain it to me in Spanish. And I found it!
Great - not only did they have nice fast wifi, but the price was excellent too. "Buy a beer and get free wifi"!
I have returned several times - gotta check the IBM mail....ehrm, or something.