I'm at some University building at the very east end of Washington Mews Street on the north side of the road.  Get over to Madison square Park (you'll see the marker right by you) and head south down that road.  You'll pas the Flatiron Building.  Keep going and you'll see the Union Square Park about half way to your destination.  When you are about 3 blocks away you'll be near a Supercuts and Institute of Audio Research.  Washington Mews is a one block street so it's easy to miss. If you hit the park you've gone a block too far.