The Bible warns us that believers and unbelievers should not marry each other, because those living in the light (of Christ) and those living in the darkness cannot live in harmony (2 Corinthians -15).
This is separate from being in a relationship, as it means only a single date, usually in someplace that isn’t a home.
“My knee just went out on me.” Another meaning, similar to the meaning of failing, is to slowly dwindle.
“Disco ball hats are going out of style.” Finally, it can mean to leave a place.
“I’m going out with him tonight.” It can also mean to fail.
This is especially common for body parts or for batteries.