For your daily dose of rock'n'roll, Daily Records is a must - the shop specializes in all sorts of rock from all the ages, including releases by local underground bands on both CD and vinyl.
If the concept of mosh pits or skanking aren't alien to you, this is where to go. The staff are extremely friendly, and equally well-informed about what's on in the Barcelona underground. It's safe bet that you can find info on this weeks punk rock shows here.
You could call Daily Records a life style shop, as they also carry a limited selection of t-shirts and other gear for looking flash at the show.