In an increasingly asynchronous world, libraries are faced with the challenge of offering service hours and access to library spaces in ways that meet their users' needs. One emerging solution is self service access, which extends service beyond regularly staffed hours. As a complement to traditional staffed hours, these new service models can be a valuable addition by offering patrons the opportunity to use their libraries when it best suits their schedules. In this session, four library systems in the Twin Cities Metro will share their experiences with self service building access solutions. By the end of this session, attendees will understand how these technologies can be implemented in different ways for various service models and communities. They will also discuss the broader impact on both frontline staff and library users in their diverse mix of urban, suburban, and rural communities.