My mother's generation was very different. They spoke a Russian dialect in my (immigrant) grandparents home, but they were taught that it was rude to use that language when out in public. The exception was Russian Orthodox Church events and holiday celebrations where everyone there was from this environment. I never heard my grandparents or any of their children speak anything but English around other people.
Well, we do not speak English one to another, it would be uncomfortable and artificial. And I consider it rude if someone wants to listen to our conversation if not invited. But I do enjoy listening to the other languages, even if I do not understand them :).