The one it gave to me is somehow better:

An atheist, a Muslim, and a Christian walk into a bar. The atheist says: "I don't believe in God, so I'm not going to pray before drinking." The Muslim says: "I do believe in God, so I'm going to ask for permission before drinking." The Christian says: "I also believe in God, so I'm going to ask for forgiveness after drinking." The bartender says: "Well, it doesn't matter to me who believes in God or not, but unless you guys pay for your drinks, you're not going to be drinking anything here