> Not exactly sexual discrimination, as they'd almost certainly ban guys that are touchy feely with female guests.

Of course it is sexual discrimination. What more is, you're skating close to it yourself by equating a woman eating quietly by herself with a guy being "touchy feely with female guests". If she was being touchy feely with male guests, and that was the justification, then that would have been an entirely different scenario.

You go on to compare it to guys "coming at the bar laughing and screaming with a couple of escorts".

Again you miss the point: If they set policies for conduct, such as "don't get touchy feely with the guests or you'll get sent to a table" or "no laughing and screaming at the bar", it'd be fine and not discriminatory.

But when they send women to tables but allow men to continue eating at the bar, it is very clear cut. I don't know if it is illegal in New York, but that clear discrimination certainly would be many other places.