OP i would suggest you to make poll with this question and run it for couple of weeks. Imho gambling site only with xmr won't be popular.
Is there any site, which accepts monero as payment for gambling
Lol, i think you didn't notice the post #8. scroll up!!
I think he forget to mention
fortunejack.comYou can gamble with monero, btc, dash, nmc, eth, clam, rdd, ltc, xdg & nvc.