One Wednesday afternoon, hours before he was to perform a sold-out gig at Red Rocks, Jack White casually tweeted the secret location of a free show that had been rumored but seemed too good to be true. But it was true: The performance, which took place at Isdajo Automotive on West Colfax, drew a throng of excited fans who crowded into the small parking lot to watch the former White Stripes frontman play a few songs. White was gone almost as quickly as he came, but the memories from that monumental day live on.