Yes is the answer I think is relative to the question but if you spend a little more time and thought formulating your question you will get far better answers than "Yes". Sorry but I have written eight or nine times as much in my reply and it took one minute. .... Neil.
You can pay in Euros in most countries in the baltics but expect a rubbish rate of exchange and expect change in local currency. Personally I believe if you are in a country you pay in the currency of that country - Sweden is the Swedish krone, Denmark is the Danish Krone, Norway is the Norwegian Krone, Estonia takes the Kroon and Russia is the Rouble. All are separate unique currencies. Finland is the only country that has the € as it's official currency.
We have booked a trip with Norwegian Sun, Feb,2010. help with places of interest and best ways of visiting, also money currency.