Not on all machines at all the casinos Rob, some of the 25 cent mechanical reel ones and the $1 mechanical reel ones at Morongo do not accept free play. It says right on it "free play not accepted on this machine". Also Morongo has a bunch of these all over the casino a mixture of 25 cent and dollar. I think Morongo might be the only indian casino in so cal I know that you cannot use free play for those games, but I am not sure. I know Pechanga you can use free play on any machine and I think San Manuel too.