Jane- I am perfectly aware of that, thanks 
Eloethan, I am so glad someone sees and understands what I am trying to say, thanks. Yes, go to a wedding in France or Italy, and see how inter-generational they are- kids dancing with grandma and music chosen for all- lovely. Same here.
thatbags- I've been thinking of my own question and the answer to 'why' is very complex. However, I think it is a sign of a very divided society- where different social 'classes', groups, ethnic groups, are kep quite separate and living very different lives- and were the individuals and families on whom those unsocial working hours are not at all the same as those who have the freedom not to do so, perhaps - and rarely meet apart from at the cash till, the counter or when visiting the loo. Compared to Scandinavian countries, where private schooling is non-existent for the great majority, as here (apart from Geneva and Zurich)- people of different groups grow up together, are educated together and belong to the same clubs together- and the impact of unsocial working practices, be they 0 hour contracts (which are totally illegal in most or all of the rest of Europe) and 27/7 shopping, are discussed and shared- with more empathy for those on whom they would be imposed. Perhaps? Very complex indeed- but I think this is what it boils down too. The American family is very much nuclear these days- whereas in central Europe the extended family still plays a large part.