That sounds absolutely lovely, kwest.
I think there is a huge gulf between 'children being seen and not heard' and running around poking people's food
. It doesn't have to be one or the other.
Older, well-behaved children are no problem, but all children should be supervised, for their own good as well as for the benefit of other diners.
On a slightly different note, I object to 'conspicuous parents' who make sure that everyone knows how clever and precocious their little darlings are, by encouraging them loudly in everything they do. 'That's right, Tarquin. You are using the fork from the outside - well done! Remember to tell the waitress that you don't want any peas with your mixed vegetables, darling, and ask if there is aspartame in the lemonade they serve. You know we don't like that in this family, don't you?'
Those people are a nuisance in museums, galleries, on buses and pretty much everywhere, but in a confined space where others want to have private conversations with their companions they are insufferable.
I know they think that their children are fascinating, but I really don't, and just because they aren't running around doesn't make them less of an irritation.