At the Audrain Concours d'Elegance and Motor Week, the atmosphere is subdued. The watches are not. The whole week is organized around the town’s Audrain Auto Museum and includes panels, dinners, a costume gala and an auction by Bonhams—where the headlining Bugatti Chiron SuperSport 300+ coupe sold for $5.73 million. On Sunday the concours d’elegance took place on the front lawn of the Breakers, Newport’s most famous “cottage,” once the family summer home of the Vanderbilts. Bloomberg's Chris