1.
https://fortunejack.com2.
https://sportsbet.ioThese two are the most reputed gambling sites which accepts dogecoin as far as I know but there are some other websites like nitrogensports and betcoin but not sure about their accepted cryptos list.
As per my checks, Sportsbet.io does not accept Dogecoin.
Sorry for this,I thought they were accepting multiple cryptos and even many payment modes other than cryptos as well that is why I thought they will accept it as well.
Anyway FJ is one of the most reputed site so you can go with them.