Almost any decent Bitcoin casino should offer Poker games. I personally prefer playing poker at Ignition casino.
Never heard about Ignition casino before, is it even a bitcoin casino? Looking at its name, seems that it is just another online fiat casino which offers luck based games such as slots, roulettes and video poker game. I think OP is asking about pvp poker game instead of video poker game.
I see that cryptopokerclub is the most growing poker site this year, indeed it is a new site but it has enough active players already. Worth to try as they offers regular promos as well.