An omnipresent ingredient in personal and professional lives, social media has changed interpersonal relationships inn umerous ways.Using the case of Facebook,this paper explores the role of social media use with coworkers in hotels through a mixed method approach. The purpose of the study is twofold. First, in-depth interviews are conducted to develop scales of key factors that influence coworker social media friending.Second,a survey is employed toinvestigate the consequences of such work-life-crossing behaviors.A framework is tested leading from the motivational/de-motivational factors to workplace guanxi via interaction intensity,workplace fun, and stress. The results indicate that motivations for relationship reinforcement, career advancement, and compliance with peers lead to increasing coworker social media interactions,while negatively-valenced factors do not have asalient impact.Furthermore, while social media interactions induce both workplace fun and stress,the overall impact on coworker guanxi is positive.