The main stage, in front of the Denver City and County Building.

It was a hot, 100-degree day in Denver, which is a record high for September. And the temperature (in the shade) was 97 degrees. I was panting a bit, trying to stay with the shade of the tree, inching back a little every few minutes as the merciless sun kept moving lower in the sky. So, what was I, a self-professed hater of heat and sun (and crowds of people) doing outside, downtown, among a throng of people? I was there to hear a live (and free) concert…