On the south side of Denver, I would suggest taking a quick drive up I25 about 15 miles to a place called The Smoking Cave. It should only take you around 20 mins unless you hit that peak 5pm rush hour traffic, but even then most people are heading south or towards Castle Rock. The owner's name is Sean and it is one of the best B&Ms in town. Great little lounge up front and a member's area in the back along with a KILLER fully stocked Humi. Lots of rarer sticks in there most days and darn good prices considering the CO tax.
Info:
The Smoking Cave
5435 Boatworks Dr
Highlands Ranch, CO 80126
phone 303-713-0022