Once again, Sonic Drive-In has brought back their popular half price spring and summer shakes promotion! Come in after 8:00PM and get any shake, float, or ice cream slush on the menu at 50% off the regular price. Choose from any of Sonic’s 22 flavors and take your shake for half price. Any shake, any day, 50% off after 8PM. No coupon or secret handshake is required to get this deal. It’s the famous Sonic Nights half price shakes offer!