Pierogi as a pub grub? Maybe let's start with saying we do not have an equivalent of public houses, as known in UK, in Poland and when still had inns and taverns the time consuming pierogi was not an usual dish in there. It changed after the second world war when the milk bars appeared.
Also, Brits did not take the idea of a public house turning it into something something, they invented them. Fish and chips is a typically British dish, not all European. And Schweinskäse. Dear God. Last time I checked it was a kind of pate, nor a sausage cheese dip!
That woman is not German, she did not spend any time in Germany or anywhere in Europe, I can assure you. And I am pretty sure she is as much a member of that beermaker family as I am (hint: I have no relation to them).
Edit: the cheese dip shocked me so much I forgot to mention I do not know any variant of the name Gudrun with umlaut u - like Güdrun.