Just sent an email to them and the Parks and Recreation Department for the City of Boston.I'm going to suggest that the Downtown Boston Alliance (DBA), fka the Downtown Boston Business Improvement District, wouldn't be a bad place to start! They do the majority of public programming in Downtown Crossing like Winteractive and they do the urban tailgates on Temple - that said, I think that works because of neighboring bars... I wonder if the steps would work with a pop-up?
Downtown Boston | Learn About The Downtown Boston Alliance
Learn about the Downtown Boston Alliance, the neighborhood it represents and takes care of, and contact staff memberswww.downtownboston.org
