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We present Project IRL (In Real Life), a suite of five mobile apps we created to explore novel ways of supporting in-person social interactions with augmented reality. In recent years, the tone of public discourse surrounding digital technology has become increasingly critical, and technology's influence on the way people relate to each other has been blamed for making people feel "alone together," diverting their attention from truly engaging with one another when they interact in person. Motivated by this challenge, we focus on an under-explored design space: playful co-located interactions. We evaluated the apps through a deployment study that involved interviews and participant observations with 101 people. We synthesized the results into a series of design guidelines that focus on four themes: (1) device arrangement (e.g., are people sharing one phone, or does each person have their own?), (2) enablers (e.g., should the activity focus on an object, body part, or pet?), (3) affordances of modifying reality (i.e., features of the technology that enhance its potential to encourage various aspects of social interaction), and (4) co-located play (i.e., using technology to make in-person play engaging and inviting). We conclude by presenting our design guidelines for future work on embodied social AR.

We present 'True Colors': a social wearable prototype designed to augment co-located social interaction of players in a LARP (live action role play). We designed it to enable the emergence of rich social dynamics between wearers and non-wearers. True Colors is Y-shaped, worn around the upper body, and has front and back interfaces to distinguish between actions taken by the wearer (front), and actions taken by others (back). To design True Colors, we followed a Research-through-Design approach, used experiential qualities and social affordances to guide our process, and codesigned with LARP designers. 13 True Colors wearables were deployed in a 3-day LARP event, attended by 109 people. From all the functionalities and interactivity the device afforded, players gravitated towards ones that emphasized the social value of experiencing vulnerability as a prompt to get together. This project was recently presented in CHI '19 [1] and may offer useful insights to others in the Ubi-Comp/ISWC community who develop technology to support co-located social experience. CCS CONCEPTS • Human-centered computing → HCI theory, concepts and models.