As mofi said there is the "Colorado Audio Society". A real good group and good support when I use to attend 26 yrs ago for a couple of years. It is a great way to hear other gear, make contacts that can help you with your system, and make some nice friends, have some neat outings and great times.
Denver, Co
I was quite surprised that there isn't a thread for Denver, so I thought I'd start one. Given the size of the city, the number of high end audio retailers around, the generally cool nature of Denverites, and the number of people who attend RMAF every year, there must be enough of us to support a club around here.