Third places are places that are neither home nor work, where people voluntarily come together to socialize. Third places are essential to social life because they provide a common ground where different communities can meet, and they promote a sense of place. Emerging information and communication technologies (ICT) are changing the way we use such third places, altering how we interact with other people and how communities are formed. The goal of the first Tutorial on Human Computer Interaction in Third Places is to provide a forum where researchers can discuss the intersection between computing and third places. We aim to introduce the theoretical basis of third place concepts as well as methods, techniques and tools to support developing a research agenda and to initiate collaboration between researchers to better understand the roles of ICT in such places.