Head screwed on wrong

You know when you have your head set for the wrong thing? I was all set for a quiet afternoon at the Letchmore Heath tea dance, a bit of nice dancing, a bit of sitting and catching up, working on some friendships, a little trivial gossip about people I long to talk about with sympathetic people who will talk about them without pointing that out, perhaps a few ill-advised confidences, maybe indulge in some minor histrionics, and then all these really lovely unexpected people turn up and I do nothing but dance and drink tea. It was great, but it wasn't what I had my head set for, and I ended up wanting more of everything, both thrilled and inexplicably disappointed and having a totally confusing afternoon before ending up eating an orange in bed.