I was told bringing a spouse to a work event meant you wouldn't get raises because family people are less willing to work late. So which is it?
Caveat: You have to be in a large company with a lot of managers.
No one will bat an eye at that answer. There are some managers / employees / peers where I know their personal life well and there are some I don't know at all. It has never been relevant.
Saying "It's none of your business and you can't force me to answer" send a very different message than "It's going alright. Did you watch the game last night? Pretty cool, huh?"