At the historic meeting house of the New York Society for Ethical Culture on Manhattan’s Upper West Side, Ed Sheeran needed little more than his voice and a guitar to whip a crowd of 700 fervent fans into a frenzy of mass sing-a-longs or hush them into enraptured silence. The British superstar bounded effortlessly from the hip-hop infused pop of “You Need Me, I Don’t Need You”, to the traditional folk of the Irish traditional “The Parting Glass” and Grammy-nominated hit single, “The A Team.”