Do you feel you have been got at Spades ? Sorry about that.
On NZ Historic births I can not find any living NZ KING births in 1928. Just a still birth to Adeline Alice & John KING. sb. 37/3/1928. 1928/13770
As Allied service men on leave, would visit their clubs, with their "mates" I would not place too great an importance upon it being, the NZ CLUB.
Also as a half brother has been mentioned, he may also have been known by another name.
Alan.