CACHE in Medford invites you to Circle the Square, the annual festival-style street fair that lights up Medford Square with live performances, local artisans, participatory activities, special dining opportunities, crafts, shopping and more. The theme for this year's event is "Medford Together." Live music will take place at the Members Plus Credit Union parking lot and Riverside Plaza. Members Plus will have Erica Leigh playing folk and acoustic music from 3:30 to 4:30 p.m.; the Niko Malinowski Jazz Trio performing…