Jazz Music Beat at www.FisherJazzSound.com

So far, The Mercato – Italian for “market” and a sprawling residential, restaurant and shopping complex in North Naples – has been one of the area’s better-kept secrets. With the kick-off of its Summer Concert Series on Friday night – an outdoor, festival-style event scheduled for 5 to 8 p.m. on the first Friday of each month through September – employees working at The Mercato hope it doesn’t …