I'd recommend to play here:
https://swcpoker.club they are far the best poker sites we've used in this forum. There are lot of other casinos out there too like Sportsbet but I don't know if they got good activity there with players anymore. Anyway, my recommendation should be just fine as there are lot of active players in there not that sure anymore since I barely visit in there these days, they use to be the go-to place for crypto poker.
Would recommend this too, as I've been using this poker site before for a long time and I can honestly tell you that it was one of the good or best poker site you can play with cryptocurrency. Although you can play with the other gambling sites too but expect that at some point they would ask or require you to submit identification as per their AML policy and unlike in Swcpoker it is pure Bitcoin and they wouldn't ask any KYC to you.