I think all theaters SAY no one under 4 will be admitted...but I'm not sure if any of them would enforce it.
I don't think I've ever been at a PROFESSIONAL show where an infant has been present...but have often been at some where the kids were entirely too young to be there due to subject matter and the like.
And if the child OR other patrons were in any way impeding on my attention or enjoyment of the show...you had better bet I'd complain to the management and if that didn't work, I'd make a scene. In fact....I have--over texting (a parent at Shrek) and another time a group of women (at Burn the Floor) that:
a: wouldn't stop talking
b: wouldn't stop taking pictures
c: wouldn't stop pulling out their phones and texting.
The usher had already BEEN on their case, and they wouldn't listen so the house manager was called. It was U G L Y. Threats were made, names were called. How they didn't kick the women out is beyond me.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.