There should be a fandom fair!
It would basically be like a con, but with more contests, and all fandom-themed. Instead of just "knitted items", there'd be a whole category for Fourth Doctor scarves, Jayne's hat, Star Trek sweaters. And cosplay contests and fanart competitions, maybe even carnival rides with names like "Spinning TARDIS" or "Starfighter Jets..."
Wouldn't that be great?