Endless indeed! I actually don't drink a ton, surprisingly with all the options. Maybe one or two a week if that. I haven't even been to all of them, but pretty much every one has something that a beer drinker will enjoy. My favorite breweries in terms of quality beers or ones that I order over others would probably be Odell's, Horse and Dragon, Black Bottle, I've also heard good things about Zwei! In Loveland just south of us there is Grimm Brothers and Big Beaver, among several others. We've also got a couple good cider places if you're into that. New Belgium is sort of a must see if you're doing a brewery tour, but lately in terms of beers I've been more interested in other options. Let me know when you're planning on visiting!