SOMERVILLE — In 2016, Zachary Baum and Matthew Boyes-Watson walked into Somerville City Hall with an unorthodox vision: to transform a vacant, U-shaped garage nestled behind a Union Square alleyway into a bustling bazaar of shoebox-sized storefronts called Bow Market. The pitch raised plenty of eyebrows among the regulators, financiers, and neighbors whose buy-in they […] The post In a region desperate for fresh retail, Bow Market is ‘a total unicorn situation.’ Why? appeared first on Boston.com .