I don't often use names unless I want to speak to a particular person in a group- usually, I just say, "you". And I don't often ask about their weekends because I'm really not interested in hearing (even more) about bloody football.
I don't stop them if they start talking about it, so I do know a fair bit about what's going on in their lives. But I was brought up by a mother who said it was rude to intrude into other people's lives.
In a previous job, I got sent to HR,because I didn't always ask about this sort of personal stuff. We didn't all start at the same time of day, as we supported AsiaPac, European and American timezones. I suspect I would have also been sent to HR, if I breezed in and said, "hi, what did you get up to at the weekend?" if they were on a call to Singapore or something. (To be fair, with one manager, I'd have probably been in trouble for breathing in the wrong way.) I was particularly pissed off, because a male colleague was actually rude to people, to the point some people refused to work with him, "oh, that's just his way, you have to learn to live with it," but I have to go to HR, I can't just be myself with my way?
And yet I usually did know what was going on with people and went out socialising with them (and still do, a few years after I left.) I often wave at people rather than say hello, if they're busy. We did chat, just not always in front of the manager, not least because he had a habit of telling everyone what you'd said. I think certainly we knew rather more about why people were off sick than we should have.
I work in IT, and a lot of us are not all blessed with the best social skills. It doesn't mean they aren't working well, nor that they aren't getting on as a team. Just that not everyone behaves just as others expect. It doesn't make them wrong, just different.