[unionpivo]

If you cant go individual offices than go, small offices, with 2 - 3 people inside.

If that doesn't work try going bigger, I'd prefer three separate 10 people offices that, one open.

And if you cant do that, and are stuck with one big place, put desks at sides, and put some kind of separator (whiteboards, message boards, kids pictures, self standing walls whatever) in the middle, and every few desks.