I should have remembered that most Bank Cards (debit Cards) in Europe have a chip in them, smart cards.
Most American ones don't.
It turns out to be a problem when you visit Copenhagen and you forget your pin.
It happened to me as I took a card I do not use too often.
I have not been able to use it at all.
To stay with money matters, note that banks are closed on week-ends.
Thanks god my stay is covered and Wonderful Copenhagen was wonderful enough to drop a Copenhagen Card at my hotel good for 3 days of free access to public transportation, discounts on museums, attractions and restaurants as well as some freebies.
Of course you can always rent a bike, very popular and safe in this city.
A day of thunderstorms
(* Girls on bikes photo by Wonderful Copenhagen)