Monroe Professional Building Monroe Professional Building offers competitive pricing for our Denver office rentals! We are your number one choice for virtual and executive office services in Denver, Colorado. We offer business-class phone service, virtual PBX and call routing options. We also have hourly and daily conference room and office rentals. Monroe offers professional mail receiving services at a physical business address in a Class-A office building! http://www.denverofficespace.net/about-monroe-professional-building.htm