Are there any 1v1 casinos that feel different?

[pixlpunks]

Or really any casinos with an interesting PvP mechanic? I've seen the stuff like Packdraw battles mode but novelty wears off after a bit, but maybe there's other things I'm missing and I'm wondering if anyone else has seen anything cool or interesting. At least from the user side, I don't really care about the casino operator side, all they want to do is make money lolll... which is fine by me as long as the damn thing is fun to play.