jjjdanny

Outline of ideas:
Hilbert's Hotel: Location, Göttingen, Germany. Works as a hotel, reception and so on. The rooms are ordered and numbered in the same manner as the Integers: 0, 1, -1, 2, -2,… Also has in infinite number of large halls that are used for conventions and re purposed by many of the hotel's residents. There is a room switching procedure but the residents are just informed to do so and don't know the reason why.
Theta-90, though they are the second MTF on the scene.