Caesar’s Palace didn’t have slot machines in the age of the apostles, so it’s not surprising that there is no explicit, direct, biblical prohibition of casino gambling. How then should Christians in America think about the growing trend of regional casinos?
For some Christian groups, the answers is based on their opposition to all forms of gambling. My own denomination, the Southern Baptist Convention, calls on “all Christians to exercise their influence by refusing to participate in any form of gambling or its promotion.” However, other traditions, such as the Catholic Church, take a more nuanced position. The catechism states,
Games of chance (card games, etc.) or wagers are not in themselves contrary to justice. They become morally unacceptable when they deprive someone of what is necessary to provide for his needs and those of others. The passion for gambling risks becoming an enslavement. Unfair wagers and cheating at games constitute grave matter, unless the damage inflicted is so slight that the one who suffers it cannot reasonably consider it significant. (Catechism 2413)
A more thorough treatment is provided in the Catholic Encyclopedia, which lists four conditions that theologians commonly require for gaming to be illicit: