At the 1993 Householder Symposium on Numerical Algebra in Lake Arrowhead, Nick Trefethen posted a flip chart and invited everyone present to write their name on it, and to draw lines connecting their name with the names of all their coauthors. By the end of the week, the graph had 104 vertices (or people) and 211 edges.
Just for fun, Cleve Moler, Rob Schreiber, Barry Smith, and I typed the graph into Matlab and looked at it in a few different ways. Here's the Matlab script.
The original flip chart is now framed on the wall of Nick's office at Cornell. He promises to bring it along to Householder 2023.