Simply the greatest capital city in the world. You can stick your Eiffel Towers and Opera Houses - we've got the Gherkin! If it's nightlife you're looking for, where else are you going to go? Paris? - it's poncey! Prague? - it's tacky! Madrid? - you'll get stuck in an air strike!
Best clubs in the world, best bars in the country, Soho, cruises on the Thames, theatre in the West End, Houses of Parliament, London Eye, Hyde Park. I'd go to London, me.