Lenn Thompson, Executive Editor: Paumanok Vineyards 2012 Riesling Saturday night, we hosted three couples — new-ish friends we’ve made through our first grader, actually — for drinks before heading out to dinner together to our local BYO joint. I pulled nearly a case of New York wines from my cellar and I could easily have picked any of them for WWD this week. Instead, I’m going to write about this bottle that one of the couple brought for us as a “host/hostess gift.” It’s rare that someone brings wine to my house (why? I WANT it as a gift, always) and I hadn’t…