Which unspoken moral rule of the pub do you think matters most?

Slipping off to the loo when it's your turn at the bar is a betrayal that will follow you for years. Some friendships have not survived it.

That draped jacket or half-drunk pint means the table is taken, no questions asked. Ignoring it is basically declaring war.

There's no line, but everyone knows who was there first. Elbowing in earns you death stares from strangers united in fury.

Nursing a half while everyone else is three pints deep throws off the whole rhythm. Equally, no sneaky speed-drinking to force another round.

Loud chatter during pub quiz is a hanging offence. Even the dog knows to keep it down when the questions start.