Yes there are gambling sites that does offer free bets. But it's usually not all the time, and some of them could be conditional with some terms around but, I wouldn't be able to give names because I believe more than one of them does offer such so it doesn't necessarily have to be on a particular one and sometimes it could be seasonal in that it could be within a certain period after which you cannot be able to gain access to such services untill the next time the conditions for such is met and they make the offer open again.