I did exactly the same as your daughter in the 1980's. If anybody approached my friend and I and we weren't interested, I'd put my hand on her knee, or she would do the same to me!
I am so glad that your daughter and her friends are following in those footsteps.
I was in a nightclub a few years ago. Happened to be in the ladies loo, when a gaggle of females came in. One had been punched in the face because the bloke she'd been dancing with didn't like it when she told him that she would not be having sex with him that night!
Her friends were all pretty drunk, so I went and called the bouncers.
The girl passed out, concussed and I told the bouncers to please call an ambulance.
The ambulance arrived very quickly, surprisingly, and the poor girl was stretchered out.
She was a pretty, blonde girl.
I just hope that he didn't break her nose or do any other permanent damage.
I would, therefore, prefer that your daughter pretended to be a lesbian than have her face smashed in by a drunken lout.