Cohen’s 4 am introduction creates a suspension of disbelief for both his concert and Lerner’s production; a performer so in command of his charms that, looking back, his mastery of the crowd seems almost preordained. Cohen is unobtrusive, yet firm. He does not hustle for attention. Even as a songwriter, he circles around the same melancholic themes. The flower children lit their matches and stared. “I would love to see those matches flare. I know that you know why you’re lighting them,” he continued, and broke into “Bird On A Wire.”