We wait for warm weather and then it gets to be sweltering. Well here in Illinois the temperatures have finally dipped down into the 80's and 70's. And I say why not have a garden party?
You can do things outside you probably wouldn't do if you were entertaining inside. Maybe go a little extreme...and everything seems to taste better outside.
Let your friends know it is a special evening. Send them an invitation. You can print this, then put your invitation in the center, scan and send as an email. Or hard mail.