Post-CHI Workshop at KAIT was held at KAIST on the day after the CHI 2015 conference. Prof. Youn-kyung Lim co-organized the workshop with three other KAIST professors, Alice Oh, Geehyuk Lee, and Jae Won Kim. To network and share ground-breaking research and innovations in HCI, the world's leading researchers and practitioners was invited. Da-jung Kim presented “Dwelling Places in KakaoTalk: Understanding the Roles and Meanings of Chatrooms in Mobile Instant Messengers”, and Yeoreum Lee presented “Design for Maintaining Behavior Change for Health Promotion through Social Reinforcement”.