ATLANTA--(BUSINESS WIRE)--This summer, SONIC® Drive-In is serving up more than just sunshine. Starting June 20 - the first official day of summer - SONIC is launching Live Free Fridays, a weekly celebration packed with exclusive in-app offers designed to keep Fridays delicious and totally crave-worthy. From June 20 through August 29, SONIC fans can open the SONIC App every Friday to unwrap a new freebie that’s automatically loaded and ready to redeem with any qualifying purchase. No codes. No h