My husband and I will be spending a week in Copenhagen then a week in Stockholm this summer. I know I'll be able to use my credit card just about anywhere, but for small things like street food and grocery purchases, I would prefer house another method that's easier on the merchant. I'm happy to pay cash but I've read that Scandinavia is going cash free. Do Denmark and Sweden use the same currency? Does anyone who's visited either country recently have any advice on the best way to pay?