By Adam Bloodworth It’s the most stressful a US election has felt in London in a long time, as Trump looms over a potential second term in office. City traders are holding off on betting on the dollar while one senior UK politician told City AM we must unite behind the outcome whichever way it swings. But until there’s a result You may choose to go to sleep early and block the noise out with some decent earphones. If you are confronting the Stateside action head on, here are the best parties happening tonight across in London. US election night parties in LondonTHE POSH ONE: THE AMERICAN BAR A…