Head Start Open House " 5:30 to 7:30 p.m., Green Head Start, 4544 Carnes Road. Activities for families and children. Refreshments will be served. 673-6306 or (800) 320-6306.Auditions for 'Hollywood Arms' " 7 p.m., Centerstage Theatre at Umpqua Community College, 1140 College Road, Winchester. Auditions will be held for this domestic drama that tells the story of Carol Burnett's early life. Parts are available for four women, four men, one boy and two girls, ages 10 and older. All Douglas County residents are invited to try out, whether or not they are students. Previous acting experience is not required. Scripts …