We once went to the movies and left Kevin with friends of ours (whose child is friends with Kevin.) We went to lunch a couple of times and to a musical and left Kevin with his grandparents. We went to a Bible study meeting once and left Kevin with a friend who was staying at our house for awhile and who Kevin has known as long as he's known us.
Never have we had a "real," teenage babysitter for more than an hour. And never have we not taken Kevin to a party with us.
All I can say is... FREEEEEDOOOOOM!!