If your hotel concierge sports golden crossed keys on their lapels, you know they are the best of the best. The pins are the symbol of Les Clefs d’Or, or The Golden Keys, a highly exclusive professional association of hotel concierges that represent the elite of the profession. “Is there ever a strange request? Not in our world,” says Brian Mackenzie, chef concierge at the NH Collection Barbizon Palace in Amsterdam and the 3rd vice president of Les Clefs d’Or International. “The world of a hotel concierge is the passion to serve guests day in, day out. To face challenges and obstacles in delivering those memorable experiences. The performance is…