Boston, Ma--3/16/03 Globe Staff Photo/Michele McDonald Senator John F. Kerry unexpectedly showed up at the Saint Patrick's day roast Sunday morning and had the hall laughing. On his left is Mayor Thomas M. Menino.( Behind him left, State Sen. Jack Hart who sponsored the breakfast); seated to his right, U.S. Congressman Stephen F. Lynch and Gov. Mitt Romney. Behind them (according to the seating plan) from left to right starting closest to Kerry are Ma. Rep. Martin J. Walsh, Ma. Rep. Eugene L. O'Flaherty ,Ma. State Sen. Guy Glodis, and Ma. Rep David T. Donnelly. Library Tag 03172003 Page One