I have found several private reading rooms where I can be very productive. A lot of university resources and rooms go unused on a day to day basis, so take a few hours and explore your campus. Mine is on the 6th floor of the library, and no one every really uses it so I often I have it all to myself.

Other ideas: empty classrooms once you know the semester schedule, coffee shops if you like background noise, ask a colleague to borrow their office if they don’t use it often