I am assuming that parents will supervise their children, including their diet, in there as much as anywhere in the lounge.

I have seen the occasional child in the kid zones. I have also seen the occasional adult without children, having an exchange of views, possibly even a free and frank exchange of views, on a mobile phone. Note that I saw them, but did not hear them, and I consider this a fine secondary use for the facility if no children want to use it at any particular time.