From September 3 through 5, car cognoscenti the world over will convene in Woodstock, England, to see and be seen at the 10th annual Salon Privé and its marque attraction, the 2015 Chubb Insurance Concours d’Elegance. Set on the grounds of Blenheim Palace, home to the Duke and Duchess of Marlborough—and the birthplace of Sir Winston Churchill—the three-day display of automotive aristocracy will include classic and one-off models (including motorcycles), the latest supercars, and concepts.

Flowing with Champagne and attendees dressed to impress, the garden-party-style Con…