9:30 a.m.-3 p.m.: Chabad of Greenwichs Community Book Fair and Judaica Sale Fundraiser, at 75 Mason St. All are welcome. 203-629-9059.
7 p.m.: Community of Faith Thanksgiving Service, hosted by the Greenwich Fellowship of Clergy at the First Presbyterian Church of Greenwich. All are welcome. 203-869-8686.
8 a.m. to 12:30 p.m. : American Red Cross holds blood drive at Greenwich Hospital. For information: 1-866-236-3276.
Noon: Thanksgiving Dinner for Seniors, hosted by the First Presbyterian Church of Greenwich. One W. Putnam Ave. Free. RSVP at 203-869-8686.
10 a.m.-3 p.m.: Westchester Model Railroad Clubs annual Fall Train with more than 150 tables of scale and toy trains. Old Greenwich Civic Center; $6 adults, $4 seniors; $8 families. 203-637-4583.
1-4 p.m.: Greenwich High School cheerleaders fashion show at Arch Street Teen Center. For more information, contact Mary Anne Catalano
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