The application prototype developed is named the "Fitness Club Management System," which specifically addresses membership and gym fitness operations. This prototype encompasses various modules, namely administration, membership, class management, and attendance, all of which rely on a PostgreSQL database to store data. What sets this application apart is its incorporation of four distinct database connectivity methods, each configured using different Object-Relational Mapping (ORM) variations, offering users a range of choices for their own applications. Additionally, the prototype serves as a simple FastAPI application, designed to facilitate a focused understanding of essential aspects like data modeling, data persistency, and query building.