I know that the club is the Danse Macabre, but the whole thing int he preview chapters reveals that there's a big fancy-to-do about the first mostly vampire dance company that's come to town (and JC is like their patron saint) and some other master vampires have come to the party to...rock out to ballet, or something.

Also, the front cover is all about a chick getting ballet shoes used as her bondage - but then, ever since the pulp horror art covers were scrapped, no cover of an AB:VH book ever reflected the contents.