People need to calm down about beer prices. Bar the supermarkets which will sell cheaper beeer, which there are loads of in Copenhagen, there are quite a few bars where drinks are cheaper at different times of the day.; People just need to Google cheap beer prices in Copenhagen and there are quite a few websites that name the bars and where they are in Copenhagen. ;-) (do some homework before you go) Then it’s just a case of writing the names and addresses down and seeing which of the bars are closest to your hotel or where you are prepared to travel to by underground, tram, bus or taxi. The obvious tip, like in any (capital) city, is not to drink in the tourist areas where drinks are normally more expensive.
Do what I do if you’re staying for a few days. Go off the beaten track towards the edges of the city centre and you’ll find loads of local bars and some hidden gems. Make a day or Afternoon of it and you‘ll come across some really pleasant areas where you can sit in a bar or outside a bar in peace and quiet and enjoy a relaxing drink whilst watching the world go by. Much better than the hustle and bustle of the city centre and fighting the tourists and ultras. ;-) Save that for the matchday.