We have been open since the start of our school year back in September!  No issues at all.  We had to reconfigure seating - but other than that, no changes.  Obviously we are seeing far fewer kids due to a large group choosing to stay 100% virtual.  Normally I would have 60-80 kids each period.  Now I'm lucky if I have 60 per day.  We are open for study halls, classes, and book browsing and check outs.  I even do curbside pickup and delivery if necessary for our virtual kids.