adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-LIFE_ENTERTAINMENT","nativepaywallcategory" : "NATIVE_PREM-LIFE_ENTERTAINMENT"};Set in Dublin, Ireland, in 1985, “Sing Street” is a seriously endearing picture from John Carney, the writer-director of “Once,” about which I am crazy. For his latest, I’m two-thirds crazy. That’s percentage enough. Working on a broader canvas, creating a different sort of artist’s fantasy of fulfillment than the plaintive “Once” offered, “Sing Street” accommodates elements of gritty realism and liberating escapism, one feeding the other.