Medusa's Guide for Gamer Girls: Feminism and Gaming

From the introduction:

One of the first times I ran games at a local gaming convention, a group of four teenage guys show up at my table. When they saw that a woman would be running the game, they all quickly made excuses to leave. Now, it had already taken a considerable bit of courage on my part — a true introvert — to break out of my shell to run a game in public... with people I didn’t know, so this snub because of my gender sent my fake bravery into a tailspin that weekend. Luckily, this only happened once, and I would go on to run many a game at various conventions over the years.