This is probably such a stupid question, but I'm having a Monday funk.
I am using an informal addressing, such as Katie and John Smith instead of Mr. and Mrs. John Smith. If they live in an apartment or condo on a numbered street, am I supposed to spell anything out? A few examples below because I'm crazy.
Katie and John Smith
123 Eighteenth Street, Apartment Seven
Katie and John Smith
123 Eighteenth Street, Apartment 7
Katie and John Smith
123 18th Street, Apartment Seven
Katie and John Smith
123 18th Street, Apartment 7
Which one is the best option? And should I write out Apartment? What if it's a condo? Should I say Number 7?
Also, I have one guest who lives on 7 Mile Road, which apparently is never spelled out as Seven Mile Road. I should stick to 7 even if it looks weird, yes?