This study aimed to analyze the relationship between fruit and vegetable intake, physical activity, nutritional status, and social interaction among the academic community at Polkesbaya Corner, a health-promotion facility developed by Poltekkes Kemenkes Surabaya as part of the “Healthy Campus Initiative.” Polkesbaya Corner serves as a campus-based innovation designed to integrate nutrition education, physical activity, and social engagement, supporting the 3rd Sustainable Development Goal (Good Health and Well-being). A cross-sectional study was conducted among 363 respondents selected through proportionate stratified random sampling. Data were collected using a Food Frequency Questionnaire (FFQ), 24-hour dietary recall, the International Physical Activity Questionnaire (IPAQ), anthropometric measurements, and sociometric observation. A statistical association was observed between social interaction and nutritional status (p = 0.024), whereas fruit and vegetable intake and physical activity were not significantly associated with this outcome. Overall, 52.3% of respondents had normal nutritional status, while 31.7% were overweight. Most participants performed light physical activity (79.3%) and consumed sautéed vegetables (74.1%) and sliced fruits (68.9%). These findings highlight the crucial role of social engagement in promoting healthy behaviors within the campus environment. Therefore, Polkesbaya Corner can serve as a “living laboratory” to foster a culture of health by integrating nutrition education, physical activity, and social participation—supporting the national health promotion agenda and the achievement of SDG 3.