You may use different techniques, but they can learn to be lovely social creatures. My own parents would indeed hire a baby sitter when their entertaining warranted it. We started teaching our children to indicate they were finished with dinner by saying "thank you for a lovely dinner" starting with their first bowl of rice cereal lol. No, it didn't sound like that, but started with a grunt, then "ku" and by 3 they charmed their hostess.
As for interrupting, ah, I WISH they had interrupted, especially when the toilet overflowed or the paint bottle tipped over.
I recently read/listened to "Bringing up Bebe" and there's a good section on just your topic.
