I'm not sure I know what a project manager is or does, in the last successful project I worked on with a (visible) project manager, we only ever talked about cars and holidays. The only utterance vaguely project related I heard was "XYZ project management tool is crap" anounced to the floor, when it crashed.
This project manager did have a larger studier desk to cope with the extra paper and books it held.
I became project leader a few weeks ago. They said I could either shove the walls out about 3 inches or stay with the job I had now. I chose the first choice, but I just exercised more so my cubicle looked bigger. Don't tell my bossthough. I'm only one more lie from getting fired :)