So you are talking with unusual gambling site ideas not totally talking about crypto casino because if we do talk about it then it
do mention common games like dice,roulette,card games etc.Im aware with micerace.com which is really unusual king of betting online
because most of unusual thing i do know is on offline ones like cockfighting and similar ones.So far i havent seen anything yet in level with micerace idea.
It seems that OP didn't understand what he just wrote in the title at all and he got confused with the common gambling in the streets with the gambling in a casino online that deals with crypto. But i have read some thread here about the cockfighting which is very rare to see since crypto gambling that we suppose to know are common games already just like poker, dice, slot, etc.
Animals fighting or insects fighting just for the sake of gambling is not really my ideal game but it is very unusual to see such games like that. I still think that if crypto would be applied to that kind of game how would they do it?