There is a vampire movie marathon at my house tomorrow...
I'm guessing not the "good" kind of vampire movies i.e.: Blade [1,2]; Underworld [1 only]; Ultraviolet; Dracula [either the Hammer Studios version or the Gary Oldman one]; I am Legend [Vincent Price version or The Omega Man]; Nosferatu; or the new version of Fright Night; or the True Blood series.
My fear for you is that this was in fact a marathon of "sparkly vampire" movies.