Five years ago, when my employer, Navarik, moved into a new building, the rooms within the office didn't have names or numbers. On my own, I decided to give them identities, and since we're in Vancouver, I named the various meeting rooms after local beaches: English Bay, Jericho, and so on. I printed up little signs and glued them over the doors.
I've been on medical leave from the company since I developed cancer in 2007, three and a half years ago, but they're still using the room names I picked. As far as I know, even my little signs are still there. I like that.
Yeah, I can attest that the signs on the door frames are still there. Even for the rooms that eventually became personal offices. I personally like the left justification you used. :)
I think I used the old Chicago font as a throwback for us Mac folks. The left justification just looks proper; centering them would have been silly.