OKLAHOMA CITY, 2017-Dec-27 — /EPR Retail News/ — Sonic Corp. (NASDAQ: SONC), the nation's largest chain of drive-in restaurants, today announced that the company will be presenting at the 20th Annual ICR Conference on Monday, January 8, 2018 at the JW Marriott Orlando Grande Lakes in Orlando, FL.The presentation will begin at 2:00 PM ET. Investors and interested parties can access the presentation by visiting the Company's…