Although a few years ago vampires may have been more popular, there still are alot of vampire fans out there today. I am one of them, though to a slighter degree than one would imagine. There's tons of Anne Rice followers who hold conventions every year, vampire sex is pretty popular, I know a few people who are into it, you've got vampirefreaks.com, etc.
It's not the most popular subculture out there, but it does have alot of people involved. Only problem is, the type of people who are into vampires aren't likely the type of people to be into wrestling.