As more campus locations establish intentional informal learning spaces, what, if anything, is the unique value of these spaces within the physical academic library? Using mixed methods, this study examines the relationship between students' use, satisfaction, and productivity needs at five discrete locations at a large public university. Findings from unobtrusive observations, student surveys, and semistructured focus groups reveal an interconnected ecosystem of campus informal learning spaces in which the academic library is prominently situated, providing guidance for those making decisions around the availability and design of library learning spaces.