I learned lock picking at Defcon in the lock pick arena. They had tools, clear locks, and locks with 1 pin, 2 pins, etc. all the way to 6 pins. And of course you could buy a set of picks right there, and just hope the TSA didn't find them on the way home.

These are the kinds of things I miss now that conferences have gone virtual for now. I hope they return to in person when safe, or at least a hybrid model going forward.