Jason is correct. It is 9 o'clock that children are not allowed in the piano bar section, but dinner remains open to everyone in the courtyard. After 9, a cover charge is in effect at Patty O's (piano bar only), and I have seen servers warn families that their children will not be allowed after 9 if they are already seated in the piano bar section and it's getting close to that time. (and I shouldn't just say "children." It is anyone under 21.)
I, too, have never seen a photographer there, and we've been there at least a dozen times in the past year. The only place we've had a photographer take our pic was the NASCAR Cafe.