Museums are the foundation of a city’s culture; the more museums a city has, the better off it is. Every museum — with its own collection and, more important, its own style and curatorial vision for bringing art to the community — is like another dollar bill in your pocket. Some metropolitan regions are rich and some are poor. In that way, the consolidation of the Kirkland Museum of Fine & Decorative Art and the Denver Art Museum, announced on May 9, makes Denver less well off.