What about long lost friends that we happen to see at a local restaraunt but have not spoken to in years. When we caught them up on our lives by telling them we're engaged, they basically invited themselves to our wedding. This has happened more than once with people saying anything from, "I want to be invited," to, "tell us when to show up and we'll drink your beer." What the heck do I say to that?
As my fiance is fond of saying, "Just Relax....."