This weekend I went to "The Greatest Steampunk Exhibition" at Kew Bridge Steam Museum
It was fantastic, I cannot think of a better venue for this event. They have scattered steampunk items through the galleries and around the engines Below is a link to the photos I took.
They were also holding heats of Tea Dueling, I've scanned and uploaded the rule leaflet in case anyone is interested how it's done, I'm off to put the kettle on to practice when I've finished this.
Just a little taster of what they had on display