Why on earth would you hold this business owner responsible for comments made by anyone other than himself?
"I am thinking about telling my daughter to no longer go there and let her friends know they aren't welcome either."
I have read every comment made on this post and I NEVER read one time where he said teens were not welcome at his pool hall.
"Wow, what a way to run a business." what are you talking about? Apparently he has been running it okay since it has been open for many years, and he must also be running it in a manner that you as well as your daughter like, since you both go there.