Art installation or makeshift shack?

Recently I walked along Georgia Street from Homer to Cardero, the first time I've made that journey on foot for a very long time. Passing this mysterious bit of construction with its partial roof and rough seating, I couldn't decide if it was a shack cobbled together by people desperate for shelter, a place for construction workers on coffee breaks, or an art installation. No sign of habitation when I passed in the early evening.