I am inviting everyone in my office (about a dozen people) and their spouses/SOs to my wedding this fall. I am sure of this, and happy to do it, and there's no drama there for me or my FI. If anyone wants to decline, that's absolutely fine and I would never be offended, but they're all welcome to be there, the more the merrier.
One of my female co-workers asked me, the other day, if I was inviting their spouses. I said, of course! (Honestly, I think it's too early for anyone to be cornering me on my guest list -- months away yet, people! -- but as the answer is definitely yes, it's neither here nor there.) She suggested that I shouldn't, and that "it can be more fun if all the work people leave their spouses at home." I was taken aback, to say the least. I mean, if that's how she feels, she can leave her own husband at home, of course, but suggesting I invite co-workers without their spouses? That seemed out there. Is this a thing? Do people do this? Isn't it contrary to etiquette that says you always invite both parts of a couple?