New Havener Mimi Chapnick was on the 7:51 a.m. Metro-North train today out of Union Station, heading to New York City. She works as a chiropractor in Manhattan, just a few blocks from where the train ride ends. “I’m lucky enough to just get out at Grand Central and walk — thank God,” she said. Others interviewed this morning also planned to walk to their destinations, which perhaps indicated that others who normally commute into the Big Apple had decided to telecommute or take the day off.