“He called me and said, ‘You’ve got to come stand in this space with me,’ ” says entrepreneur and artist Scott Cohen, recalling the day in 2011 when his friend and business partner, real estate developer David Belt, visited an abandoned, decaying structure while on a tour of the Brooklyn Navy Yard. Following a renovation by Belt’s firm, Macro Sea, the cavernous steel turn-ofthe- century shipbuilding site known as Building 128 was reborn last year as New Lab, an interdisciplinary hub where roughly 500 spacesqueezed New York City founders, developers, and designers are creating emerging technology, from cube satellites to experimental smartphones. New Lab’s 95 member companies share access to fabrication labs (with $3.5 million in prototyping tools), studios, meeting spaces, and, most crucially, each other. Casual encounters within the…