i would definitely go. what is the worst thing that can happen? you might throw some food away, or give it to someone who could use it. A meal in company and unexpected. How lovely.
My view is , excepting illness or having already promised to someone one else , always go. When I look back over my life and think of all the things I have done, even if it wasnt what I expected it to be like, it was always worth the gamble and usually was very worth while. Once when I had saved up and planned to go away, and it was cancelled. I was very disappointed and so spent a lot of the money saved on a rather lovely turquoise chiffon dress, so that I would have a lovely christmas outfit. Then got a phone call and was asked to go to Stockholm that evening. Of course I went, I was not going to miss such an opportunity although now I would have very little money for weeks if not months. ( I was doing temp work in communications and so was free to chose what I did. When I was working I always tried to do my best and so often got asked back to the same firm but that way I had choice in my life. To me experiences are worth more than money)Well I had a wonderful time, of course wore the dress quite a lot and have wonderful memories of that time. A friend said what will you do if y ou dont get another job and so forth, but I said I am not afraid of hard work and could always do washing up or whatever. That was nearly 60 years ago, and I still have wonderful memories of that time. On a bad day, when I am in a lot of pain, I can look back at many great memories and regret not one of them.