The Dorchester Collection’s Coworth Park, a country house–style hotel and spa in Ascot, England, is offering a new package designed to give guests a taste of British royalty. Called “A Royal Life at Coworth Park” (from about $4,700), the package includes a riding or polo lesson, two nights’ stay, and afternoon tea. Off-site, guests will take a carriage ride through Windsor and visit the tavern where William Shakespeare wrote The Merry Wives of Windsor; they will also make stops at the River Thames, the Guildha…