When you’re 23, there’s not a whole lot that you would find interesting about your 74-year-old aunt. So, I went for a tried-and-true hook: “Did you know I was at Woodstock?”Daniel looked up from his phone with something resembling curiosity. “Yeh?”Wasting no time (now that I had his attention), I launched into a story that bears repeating this week, the 57th anniversary of the Woodstock Music and Art Fair from Aug. 15-18, 1969.The six of us (fou…