Sonic says they have expanded their happy hour, adding a half-price special on milkshakes through summer, 2012.
After 8 pm every day through summer, 2012, Sonic has milkshakes for half price. This is in addition to Sonic’s traditional happy hour, which gives you drinks and slushes for half price from 2 to 4 pm. Choose from Coke drinks, flavored teas, roast coffees, Minute Maid juices, milk, lime or lemonade real fruit slushes, ocean water and more.
More details at the Sonic website: http://www.sonicdrivein.com