Let me tell you about the front door of where I work: It's pretty f'ing cool!
Seriously, the first time you walk up to my building you'll mutter, "holy shit" under your breath. The building is cool, the lobby is cool, the reception chairs are cool. Cool-o-rama all around.
There are plenty of other doors to get into my building. The back door, a couple of side doors. Just regular ones, nothing cool about them.
So here's the choice I have daily: enter through the f'ing cool one or enter one of the regular ones. Every day I get to decide where I walk in. A basic, elementary decision. One most people don't even consciously make.
I will tell you (as I tell every person who reports to me) walk in the front door folks! Every. Single. Day.
Even if your building or lobby isn't an oozing temple of coolness, walk in the front door. It will remind you of why you came to work at your company in the first place; it gives you the same rush that others get when they walk in for the first time (by the way, most every ad agency or design firm is pretty cool); and is a thoughtful choice on how to start your day. It is you doing your small part to validate your company, your job and the utter coolness of this creative industry we all get to work in.
Shirking in the side door just doesn't feel the same.