"Getting down from the table" - blimey, OP, that's a phrase I haven't heard for a while 😝
I don't mind it at all tbh, but it's something my mum might have said to us during my fairly working-class childhood in the 70s.
Funnily enough, we only ever ate at the dining table on a Sunday generally in those days, as I recall...most of the rest of the 70s and 80s was spent eating tea off our knees in front of the all-important telly. I bet many families were the same ofc.
However, that massively changed for our own children - 90% of the time we ate at the table in the kitchen/diner which was/is much more the way of living of the 00s/10s/20s than a separate dining room, isn't it?
Less formal, and was a good way for us to eat together as a fam most nights (when the kids were home - 2 of them have left now 😥)
Not sure I would have ever have used that phrase to them, but yep, they can't just be allowed to come and go as they please...
With posher/European work colleagues when eating out, they generally say "bon appetite" before eating, which I like, so I've tried getting the kids to say that rather than just tucking in...plus, I try to encourage a nice chat after people have finished their food - I call it a "sobre mesa" (learnt from time spent Latin America).
"Over the table" - extended chat without being distracted by actual eating...lucky to get much of that most of the time, tbh, but I try.
I'd like to say that they ask permission to "get down from the table" after the end of the sobre mesa, but they don't ofc - perhaps I should tempt them to stay with the promise of a bowl of butterscotch Angel Delight like in the good ol' days 😁