Waroeng Batja was developed as a community-based informal school in Panguragan Lor Village. This program is designed as a free, open, and participatory learning space. Waroeng Batja has succeeded in establishing a community-based informal learning ecosystem involving 70 school-age participants, consisting of 23 elementary school students, 31 middle school students, and 16 high school students, and supported by 30 student facilitators. The program is implemented through Participatory Action Research (PAR), with routine learning activities held three times a week, including reading habits, assistance with school assignments, English learning, basic digital literacy, local cultural learning, and entrepreneurial practices. Quantitatively, the entrepreneurship program involves 45 students, using 400 oyster mushroom bags that produce 180 kg of harvest, and utilizing 80 m² of land for vegetable cultivation with a yield of 120 kg. The entrepreneurship component generated revenue of Rp6,160,000, a surplus of Rp1,860,000, social cash funds of Rp958,000, measurable social benefits of Rp4,773,000, and a simple social return on investment of 1.11. In terms of culture, the initial assessment showed that none of the 10 purposively selected participants could name at least 3 forms of Cirebon culture. In contrast, in the final assessment, all 10 participants were able to name at least three forms of Cirebon culture and were involved in practicing and performing the Cirebon Mask Dance. These findings indicate that informal schools that integrate literacy, culture, and social entrepreneurship can serve as a contextual model of community service when supported by the participation of facilitators, village government, and partner networks, and by data-based evaluation.