First of all thank you all very much for your time and for all the answers. Thank you!
Well, the dilemma is somehow solved now. We will watch the play, and then leave.
I said to my husband “Or you attend the whole thing alone or we can go together, without “The Banket” (way to expensive for what it is, by the way, and, buy the way in the screen shot everybody was also told to help with the cleaning- up after it all, or as it said “we expect you to…”!. ). Summa summarum this invitation mess seems a little like “I invite you to go to Tivoli next friday, but you must pay for the “trip pass” out of your own pocket!” My husband just told our son how it’s going to be, and it was all right, but it was also evident, that he had not intended to let the invitation include a meal. Thank you also for the compliments on my english, you are VERY kind :-) Still it’s difficult to explaine oneself properly in a non- native language. Why didn’t I rise my question in a danish forum then? Well I have been following Gransnet for quite some time, and I like the english points of view, always very polite and educated, we danes could learn a lot from you. This first post of mine at Gransnet has been very helpful, and I am touched that some nice english women did spend time to answer and share opinions. 1000 tak! 