Hi Al,
I know you have good taste in wine and food. What kind of food do your friends offer when they entertain? You may have the problem of reverse snobbery and perhaps jealousy. They may not have your taste and talent in the kitchen, preferring to bring stuff in. You may put considerable efforts into your food offerings, which they cannot hold a candle to, so rather than compliment they find fault. In these cases, whenever I visit them whatever they serve I always compliment. I may have my personal thoughts, which I will not reveal, but I always find something good to say. They know I can do better, though I can be a better guest, too. A teach by example moment.
I had problems at a church ladies function: for me it was easier to make something at home and bring it. They always picked up something at Jewel. They earnestly complained I was showing off. Eventually I just faded away from that crowd.
Why not soup, sandwiches and salad?
Make two different kinds of soup, where they can sit in a crockpot.
You have that Hungarian sausage producer nearby, Alef and the German sausage producer
Koeneman's at 120 and 12. So arrange all these meats, cheeses with interesting breads and let them arrange their own meal. I would add mustards of various types, slice onions, pickles, gherkins, some pickled onions, horseradish and such. Maybe make a pate.
For salads: a wilted cuccumber salad, green salad, coleslaw and German Potato salad. I will sometimes make a roast beef, then slice it to make a salad with a Dijon vinaigrette and lots of onion.
If they don't like that, well you really should stick to cocktails and cheese. Anyway, the leftovers will not be unpleasant to work through.
Do advise later what you did do and their reaction.