Ooh, good call on Pints Pub. I love that place. Very good cask ales and they used to boast the largest selection of single malt scotch outside of Britain. Hey ryang, do they still have that odd table game? I forgot what it's called or even what it's about, but it was a blast to play after a couple drinks.
There's Obviously no shortage of places to go, and all of the above posters listed some great places. The truth is, Denver offers some outstanding choices... but you can take a drive to any of the outlying towns and find great stuff as well. Colorado Springs hasn't been mentioned, but the Trinity brewpub down there is great, and you could stop by the Garden of the Gods. I must be oppionated about one thing though... The Cheeky Monk is overpriced IMO, and you can have just as good (better) of a beer experience at the falling rock.