Party Girls by Paul V. Russo

Cover copy reads: 'Young, beautiful, bored--it took something different to give them a thrill.'

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From the back:

Jaded women

Every large city has a circle of beautiful young girls that sport the label 'party girls'. In the strictest sense they are not 'Call Girls', though the two have certain things in common: they both bloom at night, most of them are strikingly beautiful and brazenly immoral. The big difference is that the 'Party Girl' simply loves parties, and the company of other bored and jaded people who can only get their thrills form the unusual.