DKK can you pay with every places in DK. (Euro is NOT the official currency in DK)
Euro will only get acceptet in the airport, some hotels and a few eatingplaces. So you can bring some euro to the bank, and change them to DKK. Or just remember your creditcard.
Most stores in DK accept Visa and Mastercard!

BLUE - Euro countries
ORANGE - Do not have Euro - we still got our own crown!! just until the politicians want us to wote again, and get the yes they want to.
RED - 3 candidates for the Euro - they need some stability in their economy.