A handful of us have started playing Prominence P0ker which is F2P on steam http://store.steampowered.com/app/384180/
You get chips each day for logging in and the game seems to be generous enough that you never need to buy any (unless you're really bad at p0ker and extremely wasteful with your chips!!).
We were hoping to get enough players together from CR to play a tourney, we've not done this before and think you need 6 players.
Try the game out and let me know if you're interested to join. It's a fun game for sure!
Here is MattyRasker, Yogicfire and I playing a few cash hands.
(have had to use "p0ker" as CR forum doesn't allow the use of the actual card game...)