When one woman among the throng at the Calvin Klein Collection flagship store in NYC (at Madison Avenue and 60th Street) spied the mic, drum kit and keyboards visible in the main room last Friday night, she asked, “Who’s playing?” When told it was Grammy-winning Canadian rocker Bryan Adams, she was pleasantly surprised. She had no clue he would be there and was probably among the thousands of Manhattanites perusing through high end retails stores on Fashion’s Night Out. It might have seemed like a random thing, but most of the people there knew what was coming. Adams’ appearance had been well-publicized, and most in attendance were ready to heartily sing along to tunes like “Here I Am,” “Back To You,” “Heaven” and “Run To You”.