Hm.
It's possible they might worry about the fate of the people back home? How all of this advanced future tech being thrown around is going to affect things for their country, whether there's anything they should be learning to be of more use during whatever's going to happen there, if anything? Also possible they find this place more important and we should be telling them, like, what we're doing here, as a society, rockets and medicine and mass communications and warfare and politics, and they can see what they want to make of all that, but at least it won't be - obviously just distracting them from more important things.
If they just like being the most important people in the room then I don't have a lot of ideas.