A good ways into this story of two desperado brothers (George Clooney and Quentin Tarantino, who scripts) on a run for the border, the pair along with a hostage preacher (Harvey Keitel), daughter (Juliette Lewis) and son (Ernest Liu)--pull into an out-of-the-way Mexican biker bar. After a drop-dead-erotic scene a seduction dance by the bar's featured performer, Santanico Pandemonium ("Desperado's" Salma Hayek), which is one of the two reasons to see this movie (the other being an exquisite and far-better-than-needed turn by Lewis)--the narrative nothingness of "From Dusk Till Dawn" comes clear: Out of nowhere, and for no apparent purpose other than mayhem, it's revealed that the bar denizens are vampires. That, followed by particularly inactive action staging by director Robert Rodriguez, spells a more certain artistic doom than any vampire could ever threaten. Starring George Clooney, Quentin Tarantino, Harvey Keitel and Juliette Lewis. Directed by Robert Rodriguez. Written by Quentin Tarantino. Produced by Gianni Nunnari and Meir Teper. A Miramax release. Horror. Rated R for strong violence and gore, language and nudity. Running time: 107 min.