An update:
According to recently revised Policy 2.3 "The consumption of non-alcoholic beverages in covered containers is permitted at all Library locations except HMRC." This means that customers can bring in and consume the contents of bottles with lids and cups with covers so long as they do not contain alcohol; I do not consider a can a "covered container".
As for food, the policy allows food in designated areas. Rather than put up signs designating various areas as designated or non-designated or more signs indicatins "No...", food will be allowed in all locations of Central with the exception of the Computer Area on the first floor and the computer lab on concourse. However, in the areas that are a part of Inversion, only food from Inversion is allowed.
Thanks,
Mike VC