Horror movies may compel you to close your eyes in revulsion, jump out of your seat screaming, or send a delightfully uncomfortable shiver up your spine.  But the cleverest and often the most entertaining horror movies are ones that add a dash of camp to the mix, as if to say, “We know this isn’t real, and can’t or won’t really happen, but play along with us anyway.”  This is a difficult effect to pull off, and when done badly makes the movie too sophomoric to endure (such as the execrable “Dark Shadows”).  But when done correctly, produces a thoroughly enjoyable gem.  “Fright Night,” starring Colin Ferrell as a vampire in suburban Las Vegas, is such a film.            In “Fright Night,” Las Vegas high school student Charlie has achieved the transition from nerd to cool—he has jettisoned his uncool friend Ed and is now part of the “in” crowd, even latching on to the beautiful Amy as his girlfriend.  But weird Ed won’t go away.  He tells Charlie the fanciful tale that Charlie’s new neighbor Jerry is a vampire.  Naturally, Charlie is skeptical, but when he sees with his own eyes Jerry’s malevolent blood-lust, he sets out to destroy the vampire by enlisting the aid of Las Vegas showman Peter Vincent, Vampire Hunter.  Problem is, Vincent is a bit of a fraud, and Jerry intends Amy to be his Vampire Queen.            The acting in “Fright Night” is delightful, with each of the cast members balancing the realism and the self-deprecating camp necessary to make the movie scary and fun at the same time.  Anton Yelchin (“Star Trek”) plays Charlie, the teenager afraid of his past, with appropriate degrees of insecurity and bravado.  Toni Collette (“The Sixth Sense”) portrays his single mother as wistfully desiring husbandly companionship but too cautious to take the plunge.  Imogen Poots (“28 Weeks Later”) is Charlie’s strikingly nubile love interest Amy, who dotes on, teases, and challenges Charlie in a surprisingly nuanced performance.  Christopher Mintz-Plasse (Kick-Ass”) is a suitably peculiar Ed, characterized by an understandably deep-seated anger at Charlie for leaving him behind; he is at once tragic and humorous, a difficult feat to achieve.  Colin Ferrell (“Horrible Bosses”) is wickedly playful as the inaptly named vampire Jerry who insatiably feeds on women captivated by his virile good looks.  David Tennant (“Harry Potter and the Goblet of Fire”) is hilariously over-the-top as Vampire Hunter Peter Vincent (a play on screen horror star Vincent Price’s name), stealing every scene he is in.            Marti Noxon’s (“I am Number Four”) droll screenplay is based on Tom Holland’s 1985 “Fright Night,” but aptly updates that witty film, transferring campy late night movie host Peter Vincent to strutting Las Vegas showman among other things, while still retaining that film’s cunning iconoclasm.  The storyline derives much of its plot elements from the original “Dracula” (think Charlie=Jonathan Harker, Amy=Mina Harker, Peter Vincent=Dr Van Helsing, Ed= Renfield, and of course Jerry=Dracula) in spite of its 21st century setting.  Remakes are difficult to do well and need to pay appropriate homage to the first film while adding sufficient new plot elements to attain originality, and this screenplay does just that.            “Fright Night” works.  It has a few jump-inducing scary moments; it deftly mixes some creepy atmosphere with “Poltergeist”-like suburban normalcy; it contains enough gore to satisfy most splatter-film aficionados; and it combines reality and fantasy with a terrifically dry wit.  Plant you tongue firmly in your cheek, and just enjoy this crafty film—and if you haven’t seen the 1985 original, see it as well to add another layer of context to this jewel of a movie.