Larkham played for the ACT Veterans Rugby Club at the World Vintage Rugby Carnival in Hawaii in September 2012. During this carnival he also played as a reserve for an old boys team from Brazil who, not realising who he was, asked him to play second row because he was tall. Despite his other commitments, Larkham occasionally still plays with the ACT Veterans to help them raise funds for the charities they support. On 18 February 2018, he received the GENLEC Player of the Day jacket for his great play and sportsmanship in the Clare Holland Cup charity match.