Okay, it wasn’t really Barr and McCain debating; it was a debate about Barr vs. McCain. But Bob Barr did show up.
It was the monthly debate at Lolita bar, hosted by Todd Seavey. The question was “Should conservatives and libertarians vote for Barr over McCain?” The final verdict by those in attendance (not counting Bob Barr, who was prohibited from voting): 2-to-1 in favor of voting for Barr.
Here are some photos. Keep in mind that photography really isn’t my strong suit, and the basement of Lolita is really small and dark. I was sitting too far in the back of the room to get any usable photos of the debate itself.
 
Prospective Libertarian congressional candidate Francis M. Powers (see post below)
Powers’ opponent for the Libertarian nomination Susan Overeem
The winner of the debate, Dr. Avery Knapp