Only one of my friends plays games these days and it has been the same game since 2003. He only plays Tiger Woods 2004 on his PS2. None of my other friends play games. At work, the average age of my coworkers is about 55 and they will think less of me if I talk about video games. Forums is pretty much it and my gaming is a secret life. Honestly, I'd rather admit to downloading porn and then jerking off to it than playing a video game.
IIRC, you work at an engineering firm? I'm surprised then, since I'm in the defense/aerospace field and work with people mainly in their 50's all the way up to their 80's... and quite a few of them are a bit familiar with games since they generally are interested in new technology/gadgetry.
I don't really cover up the fact that I play video games. The only problem is, because people know I like games they think I am interested in EVERY game and I give a fuck about their level 80 paladin in WoW, when my taste in games is rather "focused". I do wear game-themed (and music-themed) tshirts. I've gotten phone #s (not from your geek chick or raver chick, but from your typical generic Billy Joel-listnin', beach-goin', Yankee-watchin', Napper Tandy's-hangin' LI girl) wearing these shirts:



My best friend is a huge gamer who loves fighting games and oldskool games, a few others used to be into WoW a while back and occasionally I'll run into some acquaintances who are into some pretty surprising game series. The one kid who I work with who hasn't played games since the NES era and is mostly into sports and girl-chasing told me how much he loved Dragon Warrior back in the day. Was pretty shocked when I told him there were 9 more games in the series and that it's one of the most famous game series in Japan

Or another kid I met at my friend's Super Bowl party, he got drunk and was talking with me about the Ultima series.
Of course, my friends and I all talk about porn and they all know about my love of the bush...