Per press release, the third film in the Step Up franchise has begun its scheduled 10 weeks of dance-infused principal photography, in Manhattan and Brooklyn. I don’t know about its digital 3-D presentation — though I guess that’s the next logical step for this type of film, and a lot of youth-skewing genre pictures in general — but after returning director Jon Chu’s work on Step Up 2 the Streets, I can legitimately endorse another installment in pop-and-lock, coming-of-age theatrics. Adam Sevani and Alyson Stoner both reprise their roles from the second and first films, respectively, and are joined by newcomers Rick Malambri, Sharni Vinson, Keith Stallworth, Kendra Andrews, Stephen Boss and Joe Slaughter.