The Bar/Lounge at Boulder Marriott
The bar/lounge at Boulder Marriott is recommended by professionals. Of the 3 professionals tracked on TripExpert, 2 recommended the bar/lounge, including Frommer's and Star Service.
Boulder Marriott 
Frommer's
Star Service
Frommer's "The concierge level has a private lounge, and rates include continental breakfast, happy hour, and hors d’oeuvres"
Star Service "For a nominal sum, guests can upgrade to premium-level rooms on floors 4 and 5, which have access to two rooftop terraces and a very small private lounge"
