DD is having her 18th birthday party at home, jointly with a friend. They have invited 35 guests, I am guessing (hoping!) not everyone will come. We have a smallish garden so it's fairly close to our neighbours houses, both side neighbours and those at the end of the garden. We are semi-detached. The party is on a weeknight (and not a Friday).
Given it's the day after everyone finishes their A Levels, I think they will be a bit giddy and over excited.
What time would you tell them they have to come in from the garden? What time would you tell them the music inside needs to be turned right down? DD inevitably wants this as late as possible and obviously we want to be respectful of the neighbours. Although we barely ever have a noisy party, so this is a very rare occurrence.