Wedding Card Phrases Wedding Etiquette For No Children?

Wedding etiquette for no children? - wedding card phrases

I am in the process of filling for wedding card response. Both sides of the family are large enough that we are near the capacity of the hall. We have therefore decided to exclude children under 15 and at the reception. What is the proper etiquette to say that each of these exclusions? Based on what I read, the word "occupied only for adults" has been proposed. My problem is that it does not explicitly say 15 years is not at the reception. Any suggestion is welcome.