The central character is a whirling dervish of a “party starter” who, behind the scenes of his admittedly small-time New Jersey public persona, is experiencing his own struggles to launch his personal life at the beginning of his twenties in a sweet, thoughtful and unpredictable movie. The second feature film written by, starring and directed by Cooper Raiff, Cha Cha Real Smooth (B+) is a cerebral and celebratory triumph of emotion and characters; and even when some of the plot strands coalesce as awkwardly as the protagonist’s philosophical search for career, romance and meaning, the journey is a winning and watchable high-wire act. Raiff is captivating and charismatic as the extremely talky lead whose so-called motivational dancing is the least of his charms, but it’s two women who steal the show: Dakota Johnson as a mysterious mother who attends a series of bar and bat mitzvahs where Raiff is holding court and Vanessa Burghardt as her autistic daughter whose droll deadpans are a welcome yin to Raiff’s yangs. Johnson in particular has rarely been better as she plays shy vulnerability and gets to open up in some very engaging scenes including one signature discussion over vintage blue raspberry and lemon-lime popsicles. Among the many pleasures of the film is the intermingling of generations: Raiff riffs with the likes of his curious teen younger brother (Evan Assante), his supportive mom (an excellent Leslie Mann) and a variety of characters his junior and senior with plain spoken and plaintive exchanges about the nature of happiness and romance. The music is also a propulsive, delight ranging from the title party tune and familiar works by the likes of Lupe Fiasco to gems by bands such as Homeschool and Harmony House. This isn’t a laugh-out-loud comedy nor is it a conventional romcom, but it will reward those who enjoy a tug at the heartstrings and a good “I’m still coming of age” film. Sometimes no matter the station or season in life, a little bit of party pep can put a spring in one’s step.