Aufwiedersehen Copenhagen or should that be bonvenon?

We have a glorious final evening in Copenhagen for our wedding anniversary - it was perfect sitting next to the water, eating a delicious meal, listening to a free concert outside the opera opposite. It was great.
Now though we have moved on from Denmark but we hope very much to return for a longer visit than just this taster visit. However, as we leave the Universal Congress of the Esperanto Society will be holding its meeting in the city. No work for me at a meeting like that, I imagine they don't need interpreters.