Rose asserted that 16 states and the District of Columbia allow same sex marriage; and that 400 Mayors across the country have endorsed this resolution. There are 1,341 mayors of U.S. cities with populations over 30,000. (Source)
Factoid: Gay marriages made up 17% of all marriages in Washington State this past year, the first year that gay marriages were legal. 62% of these were between two women. (Source)
There is a web site, "Freedom To Marry", that urges individuals to take action to promote gay marriage locally. Rose's efforts may or may not be part of this effort. This site has a "take action" page on Arizona. According to the site:
"In November 2008 ... anti-gay [marriage] forces in Arizona pushed through an anti-marriage constitutional amendment that excluded same-sex couples from marriage. Several jurisdictions, including Bisbee and Tucson, have passed protections for domestic partners." The site continues: "In Arizona, a majority of voters support the freedom to marry for same-sex couples, with 55% saying they support marriage, and just 35% saying they oppose marriage (Behavior Research Center, September 2013). A separate poll found that 79% of Hispanic respondents approve of marriage for all couples."
Rose asserted that communities that support diversity bring creative individuals to the community; and more business as a result. "They are places where creativity and ideas thrive. They are places where today's entrepreneurs are most likely to choose to build the businesses of tomorrow."