CHI Memorial Hospital Hixson Cafeteria Monday - Friday 7:30 a.m. - 9:30 a.m., 11:15 a.m. - 1:30 p.m. Subway at CHI Memorial Hospital Chattanooga Monday - Sunday 6:30 a.m. - 9:00 p.m. To help our patients locate buildings, departments and services on each of our hospital campuses, CHI Memorial provides the following guides for viewing and ....