Many mainstream online casinos have added bitcoin to their list of deposit options. I am a pretty big gambling fan and have played at a few of these myself, Bovada for example only allows you to deposit via bitcoin, then withdrawal to a paper check.. Slotocash and Miami club however allow you to deposit, and then withdrawal your earnings back to bitcoin, you just need to have earnings over $100 to make the request. Their are currently several of the larger casino brands now accepting bitcoin, Re: http://bitcoinonlinecasinos.net
Just be careful to avoid the bonuses, those are almost always a trap.