The Nice Guys (2016)
Incorrectly regarded as goofs
A Manhattan, however, is a cocktail composed of either bourbon, or rye, mixed with sweet vermouth and bitters and served straight-up, or on the rocks with a cherry. A Rob Roy is prepared and served the same way, but substitutes the bourbon, or rye for scotch.
March is correct in expressing his disgust towards Amelia's drink order.