My fiance and I want an all-grown up wedding. It is very formal and at night. No dinner just drinks, dancing and desserts. We only have a handful of people on our list who have children and they will be either still under a year old or just born. We don't wish to have children at our ceremony or reception. How can we polietly put this on our invitations. Does it go on the invite or on the RSVP card?