For the third year, Lakeside is expanding its annual Community Christmas Dinner into an all-day event filled with children’s activities, family-friendly entertainment and much more on Saturday, Dec. 7. Holiday movies will also be featured on Friday and Saturday.  Festivities will be held in conjunction with the Marblehead Merchants’ “Village Lights,” an event that highlights local shops and restaurants on the peninsula. Admission and parking for both events are free.