Abstract
This study explores the overnight usage of Chi Wah Learning Commons and The University of Hong Kong Libraries on the same campus. By adopting quantitative research, it investigates students' preferences in these areas and levels of social capital in the library, further, it explores the similarities and differences of user behavior between the university's undergraduate and postgraduate students. Our findings showed that HKUL had not taken full advantage of its prime location and comprehensive collection in the main library, and the full potential of overnight services. The results of this study contribute to the library management in understanding the changing needs of users and propose the potential enhancements on social capital among students and the community.