We're having a medium sized wedding, and I am inviting all 38 people from work - I have to, because I can't just invite a couple or I'd never hear the end of it. And I don't really mind, as we both have a very small family and want to have a nice-sized party. We thought it would be fun to invite people form work and have a good time all around. That being said, I wanted to know about etiquette here - do I hand-deliver the invitations, have them mailed to the office, or go after all of them for their home addresses? Of course, we're including the RSVP and stamped return envelope for everyone, so no pressure for them to give me their answers at work. But must I spend the postage, since no one is left out?