GUAYNABO, P.R. — Miriam Gonzalez stepped outside her shuttered restaurant in this municipality near San Juan and offered an exaggerated grin. “This is my happy face,” Ms. Gonzalez, 52, said, her voice heavy with mockery. “It’s a very happy face. We all have it on.” Every morning, Ms. Gonzalez puts on this happy face like … Continue reading As Power Grid Sputters in Puerto Rico, Business Does Too