Pan Historia's Monster Ball 2010

The boys never miss this event: it's a combination masquerade and Goth dance party. Last year's resulted in a paint ball fight; this year's features a mosh pit next to the formal ballroom and some not-very-friendly-looking gargoyles flying around overhead. Given that it's created as we go (as are all the stories at PH), it's like improvisational theatre on a very grand scale.