If our house was any indication
Good stuff was only for when "company" came over. That or if Mom had "the girls" in for this or that event.
Remember in good society coffee (or tea for that matter) was never served at the dinner table. But always in the living/drawing room, parlor or wherever guests withdrew to after the meal.
Of course if one had guests for "tea", luncheon, cards or whatever things pretty much were the same; you got out the "good stuff".
Have to also remember back in the glory days guests rarely saw inside housewife's kitchen. That was the realm of servants. If you didn't have any perhaps a trusted friend or two offered to "help" clear things away and or bring out desert/coffee.
If you watch lots of Bewitched (and who doesn't?) you notice Sam always serves coffee in her living room, never at the dining table. Only exception to this as was in real life was *very* informal gatherings (several seasons in Louise Tate becomes more like Sam's close friend than the wife of her husband's boss), and she has coffee at the dining table on a few occasions IIRC. But never in the kitchen.
My Mom like her neighbors had a morning "kaffee klatch" in kitchen when one of the girls dropped in during "housecleaning hours". However if it was serious company she got changed and served in the dining or living room. A visit from grandmother (Mom's MIL) usually warranted the latter. *LOL*