In a fight to the death, psychopaths have to be 'killed' at least three times before they will actually die.
In TV dramas, middle-class people only drink red wine. Everyone else knocks back beer straight from the bottle.
In soaps, the barperson remembers everyone's favourite drink, so they only have to say 'the usual, please'. No-one actually finishes their drink, though - they are all rich enough to be able to leave half of it behind when they stalk out after an argument.
Everyone gives the correct money in pubs and shops, with no need to wait for any change to be counted out.