Marietta's  First Friday Art Walk opens for the season from 5 p.m. to 9 p.m. Friday at more than 30 stores and art galleries around the Marietta Square. The free event,promoting the work of local artists, will open the first Fridays of the month through Oct. 5. Maps will be available at participating stores and at the Artists’Alley at DuPre’s Antiques, 17 Whitlock Ave.