Yeah, I would guess so as well. I've been there a couple times years ago just to use their pool tables, always with a UW student. Couldn't hurt to walk in and see if they have some sort of guest pass or maybe try to find a chill student who will let you tag along.
i have no clue about that, but at the university of cincinnati anyone can walk in to the cafeteria and get a cheap meal at the student cafe. just gotta look cleanish an have a backpack noones ever looked twice at me,
where I work (community college) we have an open campus. New campus downtown welcomes the community to come in and eat, and as always the libraries are open to the public as well. There is one room in the main campus - gaming room (electronic) that does require a student ID. pool table etc however is open.