Explore the development of a crowdsourced map for checking supermarket wait times worldwide in this EuroPython 2021 conference talk. Discover how Miki Lombardi created a solution to help people navigate long queues during the COVID-19 pandemic lockdowns. Learn about the architecture, technologies, and problem-solving approaches used, including Redis geospatial indexes, uWSGI, Flask, and scaling from a Raspberry Pi to multiple VPS servers across Europe and America. Gain insights into the logical and creative process behind building an open-source project that garnered over 2 million visits in just three months. Understand the importance of collaboration, idea-sharing, and leveraging the open-source community in developing impactful solutions during challenging times.