Picture a normal Tuesday morning, during the second day of negotiations at the Palais des Nations in Geneva. A diplomat who recently joined their country's permanent representation looks at the program of the day displayed on the entrance screen. While going through the long list of side events to identify the most useful ones to attend for their government, the young diplomat tries to remember the location of the different rooms inside the maze of the United Nations building. Next to them, a researcher is getting ready for a full day of observation, debating whether to attend side events (and which ones!), stay in the hallway in the hope of finally getting a few minutes to interview key negotiators or hang out in the cafeteria to stay upto-date on the UN staff discussions. While both are weighing their options, UN civil servants rapidly check the room for their next meeting, and quickly leave the entrance hall, heading without any doubt to the correct building.This brief immersion within the everyday of the UN reflects the complex system of interactions which characterizes international organizations (IOs). Conceptualized as both sites of international relations in the making and actors shaping global politics, IOs are made up of a diversified network of individuals. Indeed, IOs are not solely a group of member states: they are inextricably tied to both their bureaucracies and the (non-)state actors revolving around them (Weiss & Thakur, 2010). They constitute actors, fora and resources (Hurd, 2020) which participate and set