We have not been open to study halls or classes all year. We visit classes via Zoom for instruction. I teach two classes that meet in the library. Our other librarian teaches two classes that meet in the library. Very occasionally a SpEd teacher will bring a student in to sit at a table for testing or 1:1 work. No study halls, no lunchtime, no browsing. Students can reserve books and pick them up.
Our school has taken contact tracing very seriously so students are almost never in a location that they are not specifically assigned.
I'm following this thread closely and as we try to determine how things will change when/if the school opens 100%.