GeekGirlCon is possibly the first-ever fan convention specifically aimed at geeks who happen to be female, and it’s happening right here in our fair city this weekend. Saturday’s workshops include zine-making 101, a young adult author panel, “stunt-grrls,” and “Whedonistas.” Today brings comics, cosplay, Harry Potter, and the closing ceremony: a Labyrinth sing-along. Gentlemen are welcome, but if you attend solely to mack on damsels, please note this guideline from the website: “All swords, daggers, or similar items must be kept sheathed at all times.” Sheath it, bro. (Northwest Rooms and EMP, Seattle Center, www.geekgirlcon.com, 10 am–7 pm, $30)