It promises a clearer head, a heavier wallet and a night out you’ll actually remember. But does it actually help you to drink less, or is it a pint placebo? Hannah Twiggs investigates the trend for flexiboozing and explains why some people are doing it wrong O rder a drink in a pub tonight, and you may notice the person beside you doing something peculiar. A glass of wine , then a glass of water . Or a pint, then a soft drink. Back and forth, all evening, in a deliberate rhythm. They are not