Sorry, but no.

As a parent and very frequent traveler, I hate to tell you but business people don't own the lounges. If a child is there it's presumably because his parent has the right to be there.

I was very miffed myself when, a few years back, the then-Marriott Crystal Palace in Nassau, Bahamas did not allow children under 17 into the Concierge Lounge. This was not at O'Hare, this was in NAS....last I knew, a vacation destination.

Sitting with unruly children is, however, not my idea of a fun way to spend the morning either. If a few sharp looks towards the parent didn't work, I might have gone to the Concierge and said "this child seems to be lost, do you think we can find his parent?", or something to that effect, depending on the circumstance. Once the parent acknowledged his child, it might be appropriate to say something like "gee, he didn't seem to be supervised" or something gentle yet effective to convey your displeasure.

Let's face it, folks....some people don't parent well. But in many instances, people without kids or people who, at that moment have limited patience, will be less tolerant upon simply seeing children enter their 'space'. Kids aren't always poorly behaved.....and adults aren't always well-behaved. (Just take a look at how a similar thread on screaming kids/adults deteriorated, or take a look at OMNI.....many poorly behaved adults there.)