There's a bloke on the other side of her who's had a little more to drink than might be wise. (He's not the only one, in the club. Of course. But he's the one next to her.)

One of the young men behind her stagger-stumbles his way past her, bumping her elbow and turning to apologise; when he does so, he walks right into the drunk man, knocking them both to the floor in a tangle of limbs and swearwords and beer.

(The object of all this is to attract her attention, of course, while the other one idly wanders past with something in his hand and an eye on her drink.)