In 1969, he co-founded the Singapore Watercolour Society with artists like Lim Cheng Hoe, and Loy Chye Chuan, and served as the Society treasurer for many years.
On occasions, he would go on painting expeditions starting from Kampong Penjuru (current site of Eusoff Hall of the National University of Singapore), travelling up to Loyang area, and ending his day by the Singapore River.
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As with every other Sundays Yeo would meet the group at the Red House along Bras Basah Road and the members would decide where they would go to paint.
Alfredo Lim | National Cheng Kung University | Lim Guan Eng | Lim Kit Siang | Ekin Cheng | Cheng Yen | Zimri-Lim | Lim Keng Yaik | Li Cheng | Sammi Cheng | Queenz Cheng | Lim Peng Siang | Lim | Hsieh Cheng-peng | Dong Cheng Wei | Yvonne Lim | Yinzhi, Prince Cheng | Roger Lim | Phillip Lim | Paul Lim | Moses Lim | Miko Lim | Lim Si Pin | Lim (river) | Lim Por-yen | Lim Hak Tai | Lim Eng Beng | Lan Cheng Long | Joyce Cheng | Hoe |