Informal community self-organisation is a cornerstone of civil society, especially among social groups with shared life experiences, such as mothers. This article presents a case study of a faith-based mothers' group—the "Mama Club," which has been active for over sixteen years in a small town in the suburb of Budapest. The aim of the study is to explore how an informal, religiously inspired community emerges, develops, and adapts to changing social conditions. The analysis is based on three in-depth interviews and several informal narratives and focuses on the mechanisms of community formation and cohesion, the role of religious frameworks, and the development of organisational structures and participation patterns. The results show that community adaptability, its responses to generational differentiation, and the integration of digital infrastructure are key to its long-term sustainability. The Mamaklub is an example of how an informal, faith-based group can become a significant agent in the local social organisation of a rapidly urbanising town in the suburban context.

Keywords: informal community, social capital, motherhood, religious socialisation, suburbanisation, women's self-organisation, community dynamics