Eighteen cities, and in each one, seventeen large video screens projecting views from each of the other cities.
Seventeen large video screens all posted in a row on a popular street in eighteen different cities.
Each screen is equipped with a 24 hour video camera facing the street, along with microphones and speakers, so that people in each city can see and hear you exactly--in real time--as you see and hear them.
Walk down the street, and you travel the world.
Say hi to someone on the other side of the planet--maybe you'll catch their eye or ear, and they'll say hi back! Do I hear wedding bells?
...A splendid time is guaranteed for all!