walk up to her friend (the hot one) and tell her she should keep an eye on her friend (the one that was fucking you

) since, you think she is really drunk, and does things she will regret tomorrow. it is an instant DHV.]
if you want to incorporate a neg you could say instead "What kind of a friend are you?! your friend is totally wasted you should keep an eye on her!" then, you can both take her a side to cool off and start gaming where it is quieter.
tell the hot friend just for fun (because i love fun): "I have a friend you should meet... he is a real prick! you'll love him!" (which is also a false dis-qualifier)
Good luck.
Mike.