We're considering a beautiful downtown hotel penthouse as our reception venue, but it would limit our guest list to 80. I have ten very close teammates who I know would love to be at the same table, but I'm wondering if it's okay to go about inviting only them and not their SO's to the reception. I don't know all of their SO's and they respectively don't know one another's, and none of them are married. We would still want to invite the SO's of our other friends who aren't as tight as that particular group. I am positive that they would not be offended, and would like the chance to get together, but I just don't know how I would go about clarifying that in a gracious way, if it's possible. Is there etiquette on inviting a "group"?