Any sportbooks/casino without KYC ?
I do not know if there is any casino that does not have a rule in its terms of service reserving the right to ask for KYC verification. Casinos always leave this option in case there is a suspicion of cheating.
That's right, most of the gambling sites have that in their terms, so if you will not read the entire TOS, you'll be surprised that one day you'll be stuck up with the KYC requirement. Most of the gambling sites promote "anonymous gambling", but as you said, the words "reserves the right to ask for KYC" is still present.
But one of the most anonymous casinos I know is for sure 1XBIT.
I haven't checked it, but it's good if they would not ask for KYC.