How do you drink Cognac?

  With more than 150 bottlings to choose from, including a variety of vintage spirits dating back to the early 20th century, the Brandy Library is the best place to enjoy cognac in New York and possibly the whole country. And Flavien Desoblin, who opened the venerable institution in 2004, not only has 14 years of experience serving drinks but also is an enthusiastic cognac evangelist. We couldn’t think of a better guide to this oft-misunderstood liquor, so we asked him for some key pieces of advice.