appearance-wise, I'm not a fan of the ribbed-for-her-pleasure cues. But I can imagine them helping with the grip somewhat. Maybe. Like you could keep the grip a little looser and the ribs prevent the hand from slipping (or make you feel like slipping is impossible, just as good).
Men could probably be more subtle about scoping a girl's ass. But they have no incentive too. The assume the girl who's getting ogled can't see it because she's turned away. And nobody else is going to call them out on it because pool halls are kind of a men's den. The other guys can't blame the ogler for doing what they were just doing too. To be fair, some girls could be more subtle too (those with the thong straps or short skirts).