Meet me at my "Office" (wink, wink)

I didn't get a picture for this one, but believe me that it's true. Today I drove by a building that had the following written on top in big bold letters:

NORTHWEST "OFFICE" BUILDING

Why was "OFFICE" in quotes? Does that mean it's a cover-up for something else? If so, why would they make it so freaking obvious? If you were talking to a business associate and you told them to meet you at your "OFFICE" while making the quotation signs with your fingers, you'd get an odd look.