Hi Arachnes,
I agree with Vasna about using schools for classes. Either school is in
session (most of the year) or it is not (potentially the summer) but at that
time, the staff is gone. They do not have food, or many services. Yes, there
would be classroom space, but we would need maintenance
Some universities have stopped renting to conventions and some never did.
However, there are still many that have a reduced enrollment during summer and
use conventions to make the summer school more cost-effective. I've been to
many scientific meetings at universities, as recently as 2003