Photograph from Wireimage Walking through Penn Station can be one of the more depressing commutes (especially compared to those lucky Metro-North commuters who get to enter through Grand Central!), but one man tried to bring smiles and energy there yesterday: Exercise evangelist Richard Simmons. Simmons was promoting Ocean Spray's new cranberry energy drink, Cranergy, which has green tea and various vitamins. He also led commuters and workers alike through exercises. Both Urbanite and Main......