some lounges even have a kids area
+1
IME, many lounges are happy to give you a conference room for your family, as they know that this is a win-win situation for everyone.
Even if they don't think of it on their own, it doesn't hurt to ask.
In fact, one time the first class lounge was empty, so they let us go there instead of the regular lounge.
It was quite the experience having the whole first class lounge for yourself.