I am planning on inviting some of my co-workers to my wedding. I work with all women and every one of them is married. However, I don't have a relationship with any of their spouses. We have met only once or twice and are acquantences. I'd prefer to only invite my co-workers (they all get along and would be seated at the same table at the reception. There are about 6 of them) but I don't want to offend their spouses by not inviting them. What should I do? Any suggestions?