In 1894, the Browns bought a $30,000 Victorian mansion in Denver, Colorado, and in 1897, they built a summer house, Avoca Lodge in Southwest Denver near Bear Creek, which gave the family more social opportunities. Margaret became a charter member of the Denver Woman's Club, whose mission was the improvement of women's lives by continuing education and philanthropy. Adjusting to the trappings of a society lady, Brown became well-immersed in the arts and fluent in French, German, Italian, and Russian. Brown co-founded a branch in Denver of the Alliance Française to promote her love of French culture. Brown gave parties that were attended by Denver socialites, but she was unable to gain entry into the most elite group, Sacred 36, who attended exclusive bridge parties and dinners held by Louise Sneed Hill. Brown called her "the snobbiest woman in Denver".