I'm not sure if this got posted earlier in the thread by someone (though I didn't see it when I skimmed through). I posted up an interactive story some time ago, featuring two college co-eds.
An Embarrassing Morning After:
http://www.writing.com/main/interact...-Morning-After
The thread has been discussing stories with some kind of twist to set them apart, and I think this could be done with this story. The story begins with the main characters waking up with no solid memory of the previous night, and an interested author could craft the story so that they piece together what happened as they also try to maintain their modesty and dignity.