Let me offer you some sartorial possibilities for this occasion--
Ladies, the ever classic mixed metaphor late-Victorian-Goth-Lolita look:




And for the gents (I know, I know, Sarge cracked up when he saw this and my sister commented that it was "Cinnabon Goth"--a reference to Azrael Abyss and Circe Nightshade)--but humor me, won't you:


If you don't care for the Cinnabon Goth look, feel free to break out your black jeans and cloaks...
We'll snack on these:


And of course partake of the lovely absinthe ritual!

And when we're very well oiled, and possibly hallucinating, we'll dance

To this!
But it's pot-luck, so what music, snacks, entertainment, or drinks will you bring along to the Goth Ball?