An idea for an app. Make a list of all the places you've lived, schools went to, restaurants you loved, hated, movies, books, places you've visited. Then you're at a conference or reunion, and the app starts vibrating when you're standing near someone who also uses the app who has something significant and interesting that matches your profile. Take out your phone and it says what it is. You can swipe left or right or ignore it. If you both swipe right, your phones start playing a Peter Gabriel song (the same one) and you know you can have an interesting conversation with this person.