Well, as you say, you do check if they're "good people and nice to work with" - the post said pretty much that, because "being the kind of person I'd like to have a beer after work" is pretty much the same emotional reaction as "being the kind of person that is good and nice to work with", and isn't related to the fact if you're actually having beer after work with anyone.
Drinking beer with me after work or good out together in the weekend isn't one of the requirements.