We have all been there. Sitting at a table in a restaurant with dining companions who just will not put down their smartphones.
While you are talking about work, romance, or trying to get in a bit of gossip, they are skimming their Twitter feed or googling different types of cheese they've just seen on the menu.
It can be incredibly irritating. But a new game, something of a craze among diners in New York and London, aims to punish those with a Twitter addiction and reward their less compulsive companions.
Known as "Restaurant Roulette" or "The Phone Stack" – the game requires everybody sitting down to lunch or dinner to put their smartphone (on silent) in a stack at the side of the table.
Increasingly popular amongst businessmen in particular, the rules are simple. The first person to crack and pick up their phone – during the meal – gets stuck with the bill for the whole table.
As a way of punishing bad behaviour in social settings, it's pure evil genius.