THE tawdry scene is depressingly familiar. A young woman reels across the dance floor, struggling to keep hold of a glass of vodka in one hand and an equally inebriated young man in the other. Her movements are overtly sexual, if clumsy, her speech slurred above the relentless throb of music. A cluster of ogling men cheers noisily as her top slips momentarily. The girl merely laughs, seemingly insensible as she half-heartedly tries to cover herself. Her escort at last leads her to a dimly-lit corner where they indulge in a crass display of kissing. No one bats an eyelid....