I really know nothing about this church at all, other than its in the Capitol Hill region of Denver where a lot of older churches are. It's not far from the large Episcopal Cathedral in Denver. Based upon what I can find about it, it fits into the politically and theologically liberal branch of Protestantism, and its occupying a church that was almost certainly built for another denomination some time ago.
My photo of it is awful, but I was in a hurry at the time I stumbled across it.