A very simple and wonderful positive structure (and another candidate)

This poster apparently was posted all over New York City in 2009. It encouraged people to talk with strangers. How about sticking it up a bunch of these at your next large meeting. I found it via Benjamin Aaron Degenhart and the work was actually developed by Ryan V. Brennan.

In a similar vein, I just joined an website called Letslunch . It matches people within close range of each other who don't know each other but have some common interests and simplifies the process of them meeting for lunch. A clever idea - and we'll see how it works.