In some cases, I have reserved an extra room for nothing but storage. If there is an overhead projector I'm worried about, I'll get my two biggest workers to move it to the extra room until after the camp leaves. Believe it or not, all this has worked here and the directors usually thank me for helping them to keep control over their crew. One of the big problems here is that conferences and events becomes the convenient boogey-man for everyone else to blame. Must have been one of those conferences group.
Chances are it's un-authorized use.
I emphasize that this office is set up to be the official conduit for all off-campus use and therefore is helpful to them in maintaining building control. And they have my list of official events. Keeping perceptions up that our conferences groups are outstanding guests is vital. And, not that I would ever, ever try anything brazen like this, but I have heard rumors that coffee and doughnuts for the whole class and professors, plus staff, works wonders if a camp really, really wants a space and just doesn't understand that academic classrooms take priority. Patricia, We do something similar.