German term (edited): W�rdigungsecke

Thanks for the additional context -- that puts things in quite a different light.
First, I think Kieran's suggestion that 'Würdigungsecke' refers to the corner of the local where the honourable oldsters sit is probably correct, so it's not a term from psychology or sociology.
Second, I think this relates specifically to the German situation, where for decades (if not generations) advertising for Sekt has associated it with formal occasions such as New Year's, Christmas, weddings and the like, and besides giving it a somewhat elite and formal image, has 'branded' it (pun intended) as a beverage that requires a special occasion. My feeling is that in English-speaking countries champagne has more the image of being what you drink when you want to celebrate something with a bit of class (that's a subtle but real difference).

That being said, my two bit's worth for the translation would be 'the traditional German brands have become almost inextricably associated with formal occasions'. No doubt you'll get lots of other suggestions.