we do now, but when mine were tiny I used to cook for them, and while cooking for them start mine and DH's meal. We often eat mals that need to 'cook in' for a good hour, so it never really felt as tho I was cooking twice, IYGWIM, just that I was cooking for a little longer.
If I was really organised, I would make enough of mine and DH's meal that I had left overs that I could re-heat the day after for the children, so that they still had our meals, just seperate from us.
That said, that was only ever during the week when DH was working.....at the weekends we always ate together.
Now everyone is older, we eat together every day, bar thursdays, which is the worst day for lots of dancing, cubs, scouts, football (DH does the football.....he does 5-a-side).
I love it, and we ensure that there is no TV, altho we do have music playing in the background. It is good for catching up on each of our days, and also for future planning.