Dilemma!
I am close to my co-workers in the sense that while we are at work, we all talk about our personal lives openly however I haven't hung out with them outside of work except for work related functions. I have also met everyone's spouses at least once at our annual work Christmas party. We have 260 people and I have 4 co-workers who I would like to invite (but 6 co-workers in the office). I know not inviting spouses is rude but is it acceptable since they are co-workers? Also, do I extend the invite to the other two co-workers?