What should the city do with “This Green Space” — the open lot on 9th and New Hampshire beside the Lawrence Arts Center? A recent exhibit at the Lawrence Percolator put that question to the public. My response: build a playground! On Tuesday, April 27, a procession of Percolator members and volunteers took a model of the hotel proposed for that spot to City Hall, illustrating its large size in relation to other buildings and advocating for alternatives.