Northside's Junior Optimist International Club, or JOI, is an all-inclusive, service-learning organization affiliated with adult Optimist Clubs worldwide. Northside High School's JOI club was chartered in 2001 under the wing of the Noon Optimist club of Warner Robins. It embraces the positive values of optimism, respect for self and others, and independence of mind through the unlimited opportunities of community service and sponsorship by Optimist International.
The National Association of Secondary School Principals has added JOI to its National Advisory List of Contests and Activities, which makes JOI a significant school activity on the same level with National Honor Society and School Councils. Dues are $15.00 for the year, and JOI is open to all students. Applications are located outside of room 1405. Sponsors are Kim Stewart and Christi Johnson.