Please help....What is this film?

Hi,
It's driving me mad. It's at least 15 years old. I only ever saw the poster for it in a video shop. The poster shows a beautiful woman, with half of her face all horrible and rotting and everything. The line says, "They said they wanted one hell of a night."

Any ideas?!?!

Thanks

[sleepaway]

It's not 'Society' is it? A woman had half her face pulled away from her. Also the movie 'Inseminoid' had a ladys rotting face revealing a skull on it's cover.