Temporary disuse of a meeting room

My library's reopening plan calls for not allowing group meetings/ programs for a time.

There is some concern for a BOT member as to if the library can legally do this. The concern is if a community group or club that regularly meets in the library were to want to meet again, could they challenge the library in regards to this issue? In a nutshell, the question is "Do we legally have the right to suspend and not allow all meeting room use as the library reopens?"

As library director my thought process is that as long as the policy is being equally and fairly enforced to everyone then there should not be an issue. This does beg the question however as to what may happen if the city, which owns the building calls "eminent domain" and quickly demands use of a meeting space they own in an emergency circumstance. This is rare but has happened a few times in the past.

Any input you have would be greatly appreciated.