Thanks for that link! I had forgotten pineapple upside down cake, and Black Forest gateau can be yummy. I have vague memories of angel delight in my house. Don't want to recreate that.
Classic sixties dessert would be Black Forest cherry cake and I would guess classic main course would be coq au vin. If you don't want to do prawn cocktail or any variation of it, melon and Parma ham would be right on the nose and still really quite tasty. I would skip sixties-style canapés which were inedible and disgusting. Ditto drinks like snowballs (advocaat and lemonade).
For my OHs 60th birthday I am thinking of doing a small dinner party with a 1960s theme. I have a few ideas but would like to avoid prawn cocktail. Any ideas for food? Entertainment? Decor?