I ALWAYS have a gaming book of some kind with me. I don't use public transportation, but I am never found without something game related, no matter where I am. (Okay, there may be SOME exceptions...)
Funny related story that just happened - a co-worker walked through my office today and scooped up my new issue of Dungeon from my desk, then started walking around my office while flipping through it and talking to people. She has a habit of this - just browsing at pictures in a magazine while she talks. She honestly had no idea what she was looking at, but didn't really have a problem with it.
She walked all over the office with it in hand, then brought it back to me, and I told her that she just painted herself as the biggest geek in the office now - even bigger than ME - for strolling around the office while reading a Dungeons & Dragons magazine.
The best part is that she completely saw the humor in this, and we both had a good laugh.
- DocAwk