But I don't like the notion of going to work on a Sunday, that's something I would never do unless the company is going to go under (or if it was my company).
I'm also curious on how the whole team can be involved in a hiring decision. That's seriously a lot of time spent - on each candidate!
The post has since been updated, but I'll just copy it here: This isn't about actually coming in on a Sunday (most people don't) — it's to determine if this is someone who is so impressive and so nice that others actively want to be around them.
Also, as mentioned in the post, usually just the interviewers attend the meeting to make a hiring decision. In the case that someone didn't interview a candidate, but knows him or her in some other way, we want to make sure this person can also join in, if wanted.