Question: are milkshakes half off at sonic?
Answer: Sonic Drive-In: 50% Off Shakes After 8pm. ... The burger chain's daily half-price Happy Hour on drinks and slushes from 2 p.m. to 4 p.m. does not include shakes. However, if you're willing to wait a few hours, enjoy even sweeter savings — topped with whipped cream and a cherry.