I don't think we have a terribly active card game scene in Pittsburgh, but I know that there are some folks interested. We do have an active RPG scene.
The RPG scene uses a Facebook group (search for "Pittsburgh Pathfinder Society") to communicate, and we also use Warhorn to schedule games. There's a good chance that some folks interested in the card game will also be RPGers, so you might try posting there to see if you can garner any interested people. I suspect you might find some. I know that some of them also read the Paizo forums, but I'm not sure how many. (And, probably, not all of them read the Facebook group....)
And, also, if you're interested in the PFS RPG as well, we have events typically twice a month. There's a local gaming society that's mostly boardgamers, but with a side of roleplayers, and there are "game days" once a month (except November, when there's a full-weekend Con) where we schedule an all-day three-session set of games (with two or three tables each session; it's almost half a con!). The next one is coming up on December 21. We also have a one-session sitting at a Pitt game store typically once a month, where two or three games are run. The next one of those is coming up in a couple of weeks. And, sometimes other things happen; there are three or four local cons a year organized by various folks, and we've managed to run a Special at the last couple of them. (Some of us have also been known to meet for a game online; there are a few, like me, who have to drive an hour to get to Pittsburgh.)