We lived in Boulder for a year back in the middle 70's. The town was definately a nice little town done up in a historical fashion. My wife in particular like to go there and shop. Now it is indeed a hell hole of gambling and huge probably crooked money. Woe betide anyone that would interfere with gamblers.
Biking around all the fanatics in town probably isnt really smart, but as some posted cyclist are primarly interested in just riding thru.