Cheryl Arena, one of only 30 artists featured in the book “Masters of the Harmonica,” returns to The Porch with some friends to provide free afternoon blues. Raised in the Boston area, Arena has been bringing the sound of authentic American blues music to audiences around the U.S. and Europe for over 30 years. She plays everything from the urban electric blues of Chicago to the soulful Delta sounds of the Deep South, and everything in between. Reservations recommended if you plan to dine.