So it is worth hitting both the original Mtn Sun (16th & Pearl) and the Southern Sun (Table Mesa), slightly different beers on tap. Avery tap room is a must hit as well. Boulder Brewery is always nice, especially during a nice afternoon on the patio. A few new shops are in town, Upslope in Northern Boulder and Asher Brewing in Niwot. Asher is all organic and they make really good beer. If looking for a great tap room, try Backcountry Pizza and Tap Room (Folsom & Arapahoe), they have around 50 beers on tap, all good stuff. West End Tavern has been sporting a great tap list as well. Nice views from the roof, but they aren't what they used to be. The Kitchen and Salt are nicer restaurants that have good beer lists, Salt lives up to it's name, you will need to drink more. There are a lot of other good places in and around town, these are the top of mind.