interested in hearing from anyone who has fiction concerning women being drunk or drugged (without their knowledge) and persuaded or coerced into performing various acts with several men / women.
Using the keyword drugged (drugs pulls up entirely different stories!), I found 35 stories found here. Coerce pulled up 3 more found here.
And as a last thought. I tried drugging. It pulled up another 3 found here.
It's possible that some of these searches pulled up the same story. (I didn't read each title...) But, this should be a good start for you! And if there's anything you want to see in a story that you haven't found here, be sure to post back and let us know!