As the sixties “Folk Revival” gained traction in the coffeehouses of Greenwich Village and other U.S. cities, a similar musical energy gripped Toronto’s Yorkville Village, where the likes of Neil Young, Joni Mitchell, Gordon Lightfoot, Ian & Sylvia, Leonard Cohen and Buffy Sainte Marie were starting their careers in one or more of the 40 clubs there. These Canadian artists highlight a show that begins with a nostalgic medley of songs that ruled U.S. pop charts in the fifties –…