Maybe we don’t have an answer! I know coinpoker.com, they accept Bitcoin and other shitcoins, but they convert it to their own currency when you deposit, I think their currency is worth 1 dollar!

I am also interested in the answer to this question.

Scoresby

https://www.americascardroom.eu also. I remember back in the day to withdraw I would have a check mailed to me from some polish bank. it would take so long that the second you got it you had to cash or deposit it immediately because it would expire soon. 

they’ve accepted bitcoin for a long time now , on chain only, and the deposit/withdraw phases are so smooth now. 

also https://swcpoker.club they even denominate their chips in bitcoin! Your stack their on the site is subject to bitcoin price action. ACR however they just convert to USD right when you deposit