Lloyd Allen Sr. and his revolving-cast backing band returns to the Festival’s Front Porch Stage. Veterans of Portland’s blues scene are no doubt in the know regarding Allen Sr., a charming, smartly-dressed blues practitioner with over six decades of performance time logged in and around Portland. He began his performance career at age 13 with the Vibratones in the ‘50s at yesteryear hotspots like Paul’s Paradise, then later as one-quarter of ‘00s blues foursome the Cannonballs. Allen’s guitar and vocal chops have yielded opening slots for the likes of B.B. King, Dinah Washington, and more.