Newburyport, MA 9/8/07 Author Andre Dubus poses for a photograph at one of his favorite bars in town: Rosie O'Sheas, Saturday, September 8, 2007. section: travel Evan Richman/Globe Staff *** SLUG: 28dubusshowus 11 of 13 CREDIT: Evan Richman for The Boston Globe ONLINE CAPTION: Dubus at one of his favorite bars in town: Rosie O'Sheas. ''I like this place because it's dark and it's cool and it's Irish,'' he says. Library Tag 10282007 Travel - New England