you are going to a party with a friend. Leave a note at his/her house. Say:where the party is. What time you will. Where you will meet. Use the notes on this page as a model.

Hi Ann,
I've got an invitation on the party and I really would be glad if you came around. We will have a lot of fun! If you are interested, go to the restaraunt Golden Lion. Party starts at 20 and don't forget about dresscode (official style). A good friend of mine arranges it and he allowed me to invite someone. It is going to be legendary!
I will be waiting for you there!