Socialization motivates people to visit events and social interactions between event visitors influence their experience of the event. Consumer-to-consumer interactions in service settings and leisure activities have received increased attention in research; however, very few studies have focused on and analyzed the impact of other visitors on an individual's event experience. The purpose of this study is to explore how interaction between event visitors influences the individual's total event experience and how events can be designed in respect to such social interactions. The conclusions are based on a literature review and empirical data collected at a Swedish music festival. The research found that social interactions between event visitors are an important part of the event experience and the level of satisfaction for the individual attending an event. Social interactions consist of three main types: known-group socialization; external socialization; audience socialization. Every part of the event (theme and program, setting, consumables, service) can be designed to facilitate positive experiences and to constrain negative experiences related to such interactions.