Located on the top floor of a five-story brick building in the heart of San Francisco's downscale Tenderloin district, Hack Reactor is as far removed from the ivy-clad walls and rolling lawns of top-tier universities as you're likely to get.
On any given day, the school's single "classroom" is hot, cramped, and buzzing with activity. Dozens of instructors and students sit cheek to jowl in front of 40-inch monitors set up on rows of conference room tables. They are learning how to code in JavaScript. Fluorescent lights and ventilation ducts hang from the ceiling, and the exposed brick walls make it look more like a not-quite-converted warehouse than an elite learning institution.