Familiars of Hogwarts: Pirates of Black Lake
Players are the familiars of witches and wizards at Hogwarts School of Magic. Typically, they get bored and wander off to find a fun way to pass the time. This time, there's a handy ship over there. Hey, anyone want to play Pirates? Or maybe Pirates vs. Ninjas?
It's not necessary to be familiar with the Harry Potter series, though it will help if you're vaguely aware that some books were written about a boy at a magic school. It's not necessary to be familiar with the Pirates of the Caribbean series at all, and it may be better not to be because mostly they're used as things to provide puns and bad jokes. New players are welcome.
The GM likes her sleep, and will move heaven and earth to end on time or early.