Co workers?

I would discreetly give your manager and work director an invite. I wouldn't say anything to your co-workers about them not being invited!

You shouldn't have to say anything. But if anyone is rude enough to ask, politely explain that your venue and/or budget doesn't allow for a large guest list, and you're keeping it to family and very close friends.

I am in the same predicament. We work in a surgeon's office. Everyone knows when my wedding is (which is also on a Thurs night) and will know exactly who was invited by who takes off work or leaves early that day. I am in a tough situation.

If anyone says anything just let them know you are unable to invite everyone you would like so you are keeping it to family and close friends.

Dont' say anything to anyone about NOT being invited. Just invite who you'd like and leave it alone. If they are crass enough ask you, just say "oh we haven't finalized the guest list yet" or "well, we're keeping it small". If they continue to push you can just tell them they're not invited. I wouldn't go out of your way to tell people that though.

Thank you for that advice. I think that will work great!