With no real town and little in the way of nightlife, the Caribbean island of Anguilla—which is just 17 miles long and 3 miles wide—generally attracts those looking to lie low. However, those interested in a bit more action can find it on the island in August, at the conclusion of months of sailing competitions—an Anguillan sporting tradition that dates to the early 1900s. During the races’ final legs, from July 28 through August 11, parties and beachside celebrations are held all over the island. After the da…