Country Curtains’ ‘Christmas in July’ parties at Tanglewood, the Boston Symphony Orchestra’s summer home in Lenox, Mass., began 47 years ago and are still going strong, celebrating employees with a holiday themed gathering. This event’s signature cocktail, the Country Curtains Whiskey Sour, is featured in a new book, The Tanglewood Picnic, by author Gina Hyams. Read more and give the recipe a try!