I recently had a party and wrote "cocktail party" and with the r.s.v.p. info "adults only, please". I considered being subtle, but decided with 60+.
I'm planning a small (15-20 people) 40th birthday party for my sister at my parents house and would like it to be a adults only party. She and her.
“Unfortunately due to space limitations, we are having an adults-only reception. The only children attending are those who are part of our wedding party.