Holy Trinity Church (Cambridge, MA) and its Trinity Men’s Union will welcome New Hampshire State Senator Lou D’Allesandro for a luncheon and book talk on his memoir about his career in politics: Lion of the New Hampshire Senate and Thoughts for Presidential Hopefuls. Sunday, Mar. 24, at 12:30 p.m., in Charles and Nevart Talanian Cultural Hall (145 Brattle St., Cambridge). Open to the community; for information, contact the church at (617) 354.0632, or click the link to log onto its website.