As I recall, when I was in the MTC, the buildings (dorms, classrooms, gymnasium, etc.) were all numbered, with the buildings roughly in numerical order (rather than, say, in chronological order by when they were built or something).
Some (or all?) buildings also had names, à la "David O. McKay Building". And at one point, we were reminded we should be using the building names when talking about them.
Nobody paid much notice to that, as I recall. And I think even official announcements included the building number.