I have a question about this. On all the "black tie optional" threads, many people say it is rude to put this on your invitation because it implies that your guests don't know how to dress for a wedding. Then why is it okay to put on an RSVP card, "[x] number of seats have been reserved in your honor"? Isn't that implying that guests won't understand that the invitation is meant only for the specific people it was addressed to? Isn't it sort of hitting them over the head with it?
I was thinking of this because I was just reading that long thread on the I&P board about adults only weddings. Another question, which came up on that thread--if you put "2 seats have been reserved in your honor" on an rsvp card, people can't rsvp for kids who would need a seat, but what if they just assume it's okay to bring a baby that they will hold/put in their lap all night? I am inviting several couples to my wedding who will have babies at that point and am concerned they may think it's okay to bring the baby because he/she wouldn't need its own seat. How do I get across that babies cannot be accommodated without putting "adults only" anywhere? I also wouldn't know how to bring it up in conversation, ("oh, btw, we are not allowing babies at the wedding...."?) without sounding really awkward.