Population aging has become an issue that the world should to face together. Public spaces in urban areas play an important role in stimulating social interactions for the elderly, especially close social interactions. Although a volume of studies have focused on the health of the elderly and the shaping of urban space, they have neglected the need for close social behavior of the elderly group. This analysis addresses the question: What are the principles to improve public space qualities which facilitate age-friendly social interactions for the elderly? Blind-dating activities in Beijing City work as an example of close social interactions between the elderly. Methods include a case study in Beijing, field survey, and Space Syntax with related tools. The survey took place from 1 July to 30 September 2022. Around 102 elderly men and 84 women aging from 55 to 75 participated in the survey process. Results indicate that the close social interaction can positively comfort the elderly’s physical and psychological situations. It could be a path for the single elderly group meet a partner, make new friends, and establish new social networks. Consequently, three principles, including obtaining the safety of public space, keeping greenery in the social environment, and providing suitable space for close social interactions are proposed towards age-friendly urban areas. These support the regeneration of the elderly’s social life and stimulate a chasing of happy later lives.