But weirdly, I’ve never asked for Dr Pepper in a bar because you know they’re not going to have it and there’s that mild embarrassment about asking for something they haven’t got, and feeling like a bit of a twat. However, if you ask for Coke and they don’t have it, it’s their fault not yours, the whole dynamic’s completely different. The only place that it’s socially acceptable not to sell Coke is a total health farm weirdo place full of organic produce, and even then it’s a bit irritating. They’ll have loads of those Fentimans Victorian-style lemonades, and even then it’s a bit irritating—come on, just sell Coke for crying out loud! Everywhere else has to sell Coke and it’s their fault if they haven’t got it. An aversion to little things like minor forms of embarrassment stop me from being a maximiser and asking for Dr Pepper, and I’ll always ask for Diet coke if I’m in a pub or a bar unless they have some massive sign saying ‘We Sell Dr Pepper’, in which case I would obviously ask for Dr Pepper.
Excerpt from: Rory Sutherland: The Wiki Man by Rory Sutherland