If there are any people left on the planet who haven’t heard of 1978’s most popular film, the marketing folks behind the sing-along version of Grease appear to have an idea who they might be. The flick that cemented John Travolta’s movie superstardom, and gave Olivia Newton-John her only taste of it, is now cannily being tagged “the original high school musical.” It’s being rereleased in select theaters with the lyrics splashed every which way across the screen, like the doodles from some 12-year-old girl’s Pee-Chee. The words to “Greased Lightnin’” have the O’s done up to resemble car tires—as if Travolta swiveling in full-tilt Elvis homage weren’t engaging enough. Hey, whatever gets ’em to the classics, right? And, make no mistake, Grease—despite the fact that everyone in the cast is obviously old enough to be running the P.T.A.—still looks like the stuff of which legends are made. (The print is newly restored.) When the T-Bird gang first calls out “Hey, Zuko!” and the camera zooms in to capture Travolta’s magnificent mug, you know you’re in the presence of a god. Zac Efron? As if. (PG-13) STEVE WIECKING

Thu., July 8, 7 & 9:45 p.m.; Fri., July 9, 7 & 9:45 p.m.; Sat., July 10, 7 & 9:45 p.m., 2010