as ive seen topic focusing on casinos offering no withdrawal fees, I made a list of casinos with internal exchange (usually can be found in their cashier tab) along with the supported cryptocurrencies.
for those gamblers who are interested in exchanging their coins before playing and before withdrawal =

               
Note : Gambling sites using Third Party Services
You can also exchange your funds between/inside stake.com, using the services of dinabot.exchange. you can visit their new thread, and check their promocodes. The exchange fee rate is about 3-5%.
Also, Poorbot.io, is now offering a simple currency exchanger for Stake casino, with effective fee rate of about 0.3%.

*special thanks to bullrun2020bro for the table format and hosseinimr93 for calculating the approx. exchange fee (ref. CoinGecko.)

NOTE : since all of the gambling sites listed so far have NO KYC requirements, i removed the column asking if it requires KYC or not, so we will just add under Additional Notes if it requires KYC, otherwise, the site has NO KYC

for those who want to add gambling site, you can use this format :


suggestions are welcome and this post will be updated accordingly. thanks!

Crypto.Games
Supported Cryptocurrency : Bitcoin, BitcoinCash, Dash, Doge, ETH, NEO, Litecoin, STRATIS, Monero.

They already give you the rate on the website, the rate always automatically update every few minutes according to the market price. More information about their exchange converted you can find on Crypto.Games.

Source : https://crypto.games/

Bitsler doesn't allow all users to use their exchange.
Users must reach Bronze 2 level to be able to use Bitsler's exchange.
The amount needed to be wagered for reaching Bronze 2 level varies from 1,140 to 2,280 dollar depending on games you play.
More information can be found in the following article.

Bitsler Casino - How to use the Exchanger?

This is a nice question to ask IMO, there rate of exchange is useful to be included in the list op for better clarification, I know mostly that some gambling platforms might charges high and low depending on their terms and conditions, so I think it would be good to implore that in your table so gamblers have the option of choosing their respective site.

@hosseinimr93 , will include the remarks in bitsler. thank you.

@bullrun2020bro, thanks much for the format, will edit the OP in a bit!


exchange rates depend on the market price so not possible to integrate it in the list (but if i found that they are basing their rates to a specific site, will include as well)


will adopt bullrun's table for easy reference.
as long as there's no existing issues with the site, will include in the list. i have no accts in other gambling sites so feel free to post your suggestion if you found a casino with their own exchange.

despite it's a faucet site, also coinpot and their websites allow to exchange directly bitcoin and other crypto.
They have a multiply game (like a dice site with some options) that allow you to gamble on their site.
You can easily exchange the following coins:
BTC BCH DOGE LTC DASH (Tokens - a sort of coins created by them and rewarded free to users)
since they don't ask for withdrawal fees, I have found very convenient deposit dogecoin (from an exchange) and then exchange to bitcoin

"you can only exchange the coins they support"   : the goal of the topic is precisely to name them ralle14.  
So correct me if I'm wrong but it's BTC, LTC, ETH and DOGE and it doesn't support fiat currencies.

It could be a good idea to list the effective exchange fee, since gambling sites usually charge very high fees compared to traditional exchanges by offering rates below market. From the sites that I know, Bitsler charges 5% and Crypto.Games charges 3%.

thanks and KYC stuffs added.


coinpot added! thanks.


yolodice added! thanks.
onehash - will check this site first.


dont worry im checking the site also. 


duckdice & tower.bet added! thanks much!
primedice & stake are added in the list as you can exchange your coins within their site. windice corrected. thanks.


let me see if we can get that info to others. btw, is there particular statement from the site that they are charging such percentage in their effective exchange fee? because if we have no direct reference, hard to put that for added info.


pls see below response of betnomi regarding exchange rates they are applying within their site. so we cant add betnomi yet as we cant actually see a separate tab for internal exchange

I don't think you can exchange on stake.com from one coin to another at the time of withdrawal of funds.

This is because they don't provide that service. There's third party which isn't related to stake but provides an awesome exchange service at stake which is Dinabot which can be used at cryptogamblers.pub or just type cryptogambers pub on Google. The charge is a bit too high, but worth it.

Thanks for the list though, it really helps.