Since the inception of SHOBCA, reunions across the country have been a way for Old Boys to reconnect. In 1941, 50 Old Boys who were members of the Armed Forces gathered in Cairo during World War II.
Reunions are held annually in Auckland, Hamilton, Wellington, Tauranga, Dargaville, Taranaki, Paeroa, Dunedin, Whangarei, Kaitaia, Papakura, Whakatane, Rotorua and Hong Kong. Biennial reunions are held in Pukekohe, Papakura, Hong Kong, Brisbane, Sydney and London.