The Pleasure of your company is requested

In the time before Al Gore invented the WWW, when people actually wrote letters, and couldn’t very easily broadcast every word to everyone they knew, there was an annual invitation mailed, and, often times, a witty response. Examples below:
Marching Orders

Mendy Reply

After some thought (and after coming to his senses), revised marching orders were mailed:

Revised Marching Orders

The revised orders were well received:

Fred Reply

Later, when the exalted grand poo-bah of the RE bought stationery and had to show it off, an invitation looked like this:
Invite for '89

or this:
Invite for '90