There are lots of bars and such right outside Coors Field. Breckenridge is good (I was just there yesterday) but as someone else mentioned, there are many others with rooftop seating. The 16th Street Mall is four blocks from Coors and goes 2.5 miles, ending at the Capitol, which has tours and, yes, great views from the observation deck. You can pretty much walk to anywhere downtown. And there are free busses on the 16th Street Mall that run all day and night.
The Coors tour is boring, and besides, it's Coors. Take the hour drive north to Fort Collins and go to the New Belgium brewery. No need to take the tour to get decent amounts of Fat Tire and other solid beers. Also, Fort Collins is a fun town, and good places to eat in Old Towne.
Boulder (30 miles away) is very nice with lots of shops and good places to eat. Also has a walking mall. Tons of hiking and biking trails nearby. Rent inner tubes and go tubing on Boulder Creek.
The recommendation of Red Rocks cannot be overstated. It's tremendous.
If you want to hit the mountains, drive up to Estes Park and go into Rocky Mountain National Park. Or drive west to Idaho Springs and find the exit for Mount Evans and drive to the top for some great scenery. Go early because the clouds roll in early afternoon (I was on a peak two miles to the west on Saturday and it was clouded over in mid-afternoon).
If you're going to Colorado Springs for the Sky Sox, check out the Garden of the Gods in Springs. You can pay, I want to say $15, and drive up to the top of Pikes Peak. Go check out the Air Force Academy nearby. The Royal Gorge is about 90 minutes southwest of Springs.