I like the open office concept for team collaboration, but see the need sometimes for privacy and focus in getting things done.

We are considering an activity based workplace with a mix of open office, small team rooms with couches, conference rooms and private offices for management. I am also thinking about designing desks in an open office with retractable dividers so that when you need to get something done and don't want distractions, you can raise the dividers on your desk.

Anyone have positive or negative experience with any of these ideas or other office layouts that have worked well?