Over the past three years, overnight study hours have shifted between two different library branches and a new student-run facility that was intended to be a learning commons that would be managed by the student body of a southeastern US academic research library. This paper presents a completed two-phase study examining the preferences, needs, and uses by students of two on-campus, overnight study spaces. Multiple university researchers used online student surveys, unobtrusive observations, and sentiment analysis of over 2,000 open text survey comments to provide comprehensive data for administrative decision-making. Each facility has unique elements and services but only one could be funded to remain open overnight. The findings indicated that the most practical solution remained the traditional library setting for its greater number of seats and abundance of existing library features (public computers, group rooms, quiet spaces) that students expect in a study space.