With that I've decided to rate events on the following scale, which I will call the Spacefem Scale of Kid-friendliness. 10 is as kid-friendly as you can get:
10: We love kids! We're renting a bouncy castle!
9: No special kid prizes, but children are definitely welcome and may even be named on invites.
8: Party is for all ages, will be held during the day to encourage happy kiddos.
7: Party is for adults, but our own kids will be there.
6: Our kids may or may not be there, but our house will be somewhat childproofed.
5: House may contain hazards & breakables, but we'll at least glare at guests who say bad words.
4: Guests will be themselves, but are typically to pretty calm and we didn't invite That One Guy who broke the coffee table last year.
3: Rowdiness is possible, alcohol may flow freely, especially as the night goes on.
2: Debauchery will be tolerated and maybe even encouraged. There will be widespread drinking
1: in the bouncy castle. Better not bring the kids.