bubblesbit.com
coinroyale.com
betking.io
fortunejack.com
primedice.com
satoshidice.com
betterbets.io
bitdice.me
crypto-games.net
safedice.com
rollin.io
bitsler.com
those has instant withdrawals (maybe i forgot some sites)
i think all this site have instant withdraw but depend of how many bitcoin you withdraw.
i remember all site have a limit in the wallet for payment, later for received a payment to cold wallet you get wait the owner