My friend wants to invite just a few people from work to her wedding, but to limit the #'s,
She'd like to invite them individually, not "with guest" and some are married. Is that acceptable?
This is not a traditional - service first followed by reception - wedding, so inviting to the church only is not an option. It is only the celebration following a wedding that has already taken place elsewhere. She is also concerned about the etiquette of inviting some from work and not others. Any comments?

I believe it is extremely acceptable to invite co-workers while not inviting all, as long as invitations are delivered to home addresses and hopefully there will not be too much chatter around the office. I do not believe that it is good etiquette to invite and exclude with guest. You can always send out the invites to the individuals themselves without addressing them & Guest and hope the RSVPs come back similarly.

It is fine to invite some co workers and not others. She should invite the ones that she has personal relationships with and not invite the ones that she has strictly professional relationships with.

As for the guests, it is not OK to invite married people and not allow them to bring their spouse. Your friend should think about how she would feel to be invited to a party without her new husband. As for inviting single people, the invitation should be addressed to that person only. If someone RSVPs that they are bringing an uninvited date, your friend she say nicely that unfortunately, due to space and money, the guest list had to be limited and while she would love for the invitee to attend, there simply isn't room for any extras.