We used to do dinner parties, can't be bothered with all that palava anymore, as you say Mrs Mopp all a bit '80s. I find it's easier to reciprocate with a Sunday roast, there are always vegetarian alternatives, plus interesting vegetable accompaniments, or howabout an alfresco lunch, summer of course, cold salmon, umpteen salads, get the barby out, cold puddings......possibilities are endless. Alternatively, an afternoon tea, plus a glass of Prosecco, loads of scope there, cakes, sandwiches, tarts, quite easy and if you don't feel like knocking it up yourself, well as others have said..........there's always Marks and Waitrose
I'm lucky on that score I've got loads of my late mother-in-law's lovely bone china tea service, including tiered cake stand, which I don't have a lot of opportunity to use otherwise, unless I do a tea, which we do occasionally.
Food for thought
Good luck with whatever you decide OP.