Subway and commuter rail ridership is averaging about 40% of normal after plunging to 10% last spring, when the subway system began closing for several hours overnight for the first time in its more than 115-year history. Shakeem Brown, an artist and delivery person who works late in Manhattan, spent up to three hours a night commuting back to his Queens apartment before 24/7 service resumed Monday. Brown, 26, said it's “refreshing” to see things opening up. At e's Bar on Manhattan's Upper West Side, “we feel the energy” of social life ramping up, co-owner Erin Bellard said. “People are so excited to be out.”