Oct. 19-20: Las Olas Art Fair, 740 E. Las Olas Blvd., Fort Lauderdale; 561-746-6615 or artfestival.com. Nov. 2-3: The Fall Boca Raton Fine Art Show, Sanborn Square Park, 72 N. Federal Hwy., Boca Raton; zapplication.org. Nov. 21: FIU Interior Architecture Festival of the Trees, Coral Gables Country Club, 990 Alhambra...