An exception was a Walmart in Lakewood, where more than 100 protesters marched outside the store in support of the workers. Some held signs accusing the retailing giant of corporate greed and underpaying its workers.
A union-backed group called OUR Walmart was staging demonstrations and walkouts at hundreds of stores on Black Friday.
The Lakewood Walmart parking lot was half-empty by mid-morning, but shoppers were going in and out of the Walmart without incident.
Shopping was brisk in other areas. Long lines developed overnight outside Target, Best Buy and Toys "R'' Us stores in Denver.
(Copyright 2012 The Associated Press. All rights reserved.)