I suggest you visit BetEast.eu they have an e-sport section and they accept some of the less popular cryptocurrencies and it's a secure website that way you won't have to pay high fees for your transaction.
Dont listen to this guy, they are going to charge you outrageous fees anyway, there is no way to avoid the fees.
If you want to join a casino that is taking litecoin, ripple, and so many other coins as a way of funding your account, then try to use the ones who are in this forum.
I dont know if the one who is on my signature is offering this kind of services, but it is plenty of them in the forum.