For some reason, dedicated rock'n'roll-bars have had a tumultuous existence in Copenhagen, and it'll be interesting to see if the most recent one, High Voltage, sticks around. For now, this is your downtown stop for all things rocking.
Catch the cream of the current underground rock and metal scenes in Denmark and the rest of Scandinavia. There are often live bands; check the schedule on their FB-page https://www.facebook.com/highvoltagecph