Earlier quoted context omitted.
This is what they claim: "There are two almost sure-fire ways to understand someone’s perspective. The first is to eat with them. How do they treat the wait staff? Are they demanding, or easily agitated? What happens when things aren’t perfect? The other test is to meet their significant other. What qualities did they choose in the person with whom has the most influence over them? We call these the asshole acid test…
And if your meal with them also reveals that the person asks the waiter whether the meat is Halal, or that their significant other is the same sex as them, then you had better have a better argument than 'I just didn't like the way they treated the waitstaff' or 'I don't like their SO' to justify not hiring them...
Incidentally, I do think that taking people out for drinks to evaluate their character is a lousy practice but simply because many people don't drink for many reasons. Not because someone might secretly find out you're a religious minority.