How about the reading where your co-reader indulged several "camel yawns" as you read? (That is, head back, mouth wide open....)
Or the reading where a friend of a friend set it up and said this was a must-read place, and the only people who turned up were four of his friends?
Or the reading where you were told you couldn't sell books?
All these happened in the first year following the release of my first book, over 21 readings. I also had some very different experiences with amazing, appreciative organizers, but I'll get to them shortly. For now, I'd be glad to hear of other poets' less than splendid reading experiences.