I don't live in Denver, but when I was out there for work, I went up to Fort Collins where there is a wonderful LYS with lots of classes, etc. I don't know where you live in Denver, but even from Englewood it was only a little over an hour. The store was called Lambspun of Colorado, and I really wish I could go back!
They have a cafe where you can get snacks or coffee and sit and knit, they have a wonderful large workroom where people just come to sit and knit-- you get the idea. Everyone there was just wonderfully helpful- both staff and knitters. Their website is www.lambspun.com