Classic Margarita (158 calories approx) – LMNOQ Skybar: Don’t ditch the classics if you’re on the lookout for a low-calorie cocktail. LMNOQ’s Margarita has less than 170 calories and has tequila, orange liquor, lime juice and sugar syrup (however, a flavoured margarita may go beyond the 230-calorie mark depending upon the fruits or syrups needed)