I have discovered a Minecraft server that gives out Bitcoins every 15 minutes. You can use these to gamble or you can withdraw them. There is also freeplay. The server IP is Bitvegas.net and the link to the website/wiki http://bit.ly/1irmZul (or bitvegas.net/?r=blackflame_x). It is really fun and the wiki is really detailed. (Definitely read the Wiki before you play.)