The Vineyard Gazette will hold an informal open house on Friday, Dec. 13 from noon to 3 p.m. at its office at 34 South Summer street in Edgartown. Drop in to say hello, meet the staff of the Gazette and the Martha’s Vineyard Magazine, have a glass of cider and take a short history tour of the Vineyard’s longstanding newspaper of record. All are welcome. Dogs should be leashed, please.