The largest audience of the summer showed up for the final Free Fridays at the Fort blues concert by performed by musicians Jayy Hopp, left, and Andrew Alli on the Commons at Fort Worden State Park on Friday. That night, the The Port Townsend Acoustic Blues Festival also hosted Blues in the Clubs. Today, the Centrum program will present the Acoustic Blues Showcase Concert on Littlefield Green outside the McCurdy Pavilion at 1:30 p.m. and host another Blues in the Clubs tonight. For information, and tickets, see https://centrum.org/programs/blues/.