Ay Doris, for reasons unknown, is one of THE places in Tampere--dark, underground, and full of students, with cartoon pictures on the walls. They charge for the entrance (no Visa Electron accepted), and you can expect a queue. If there is no queue, don't bother to enter--it's a dead night, and the place is probably deserted. They get all sorts of people down there and know how to deal with them, so no drunk and disorderly conduct! Music is kind of god-knows-what, but you can recognize rock there at the moment, if anything. The place has its rough, down-and-dirty charms and looks best after four beers. Real fun starts to happen after 1am. Don't bother coming earlier.