movement of the 1970s, 80s and 90s often attempted to hide masculine lesbians, feminine gay men, transgender people, and bisexuals from the public eye, creating internal divisions within LGBT communities. LGBT movements have often adopted a kind of identity politics that sees gay, bisexual and/or transgender people as a fixed class of people; a minority group or groups. Those using this approach aspire to liberal political goals of freedom and equal opportunity, and aim to join the political mainstream on the same level as other groups in society. In arguing that sexual orientation and gender identity are innate and cannot be consciously changed, attempts to change gay, lesbian and bisexual people into heterosexuals ("conversion therapy") are generally opposed by the LGBT community. Such attempts are often based in religious beliefs that perceive gay, lesbian and bisexual activity as immoral. However, others within LGBT movements have criticized identity politics as limited and flawed.Elements of the queer movement have argued that the categories of gay and lesbian are restrictive, and attempted to deconstruct those categories, which are seen to "reinforce rather than challenge a cultural system that will always mark the nonheterosexual as inferior." Daughters of Bilitis The Daughters of Bilitis , also called the DOB or the Daughters, were formed in San Francisco, California in 1955 by four lesbian couples, including Phyllis Lyon and Del Martin. Martin and Lyon also have the distinction of being the first legally married gay couple in the U.S. at the start of the historic San Francisco 2004 same-sex weddings. Their marriage was voided 6 months later by the California Supreme Court. The Daughters of Bilitis (DOB), was the first lesbian civil and political rights organization in the United States. The organization, formed in San Francisco in 1955, was conceived as a social alternative to lesbian bars, which were subject to raids and police harassment. As the DOB gained members, their focus shifted to providing support to women who were afraid to come out. The DOB followed the model of the homophile movement as developed by the Mattachine Society by encouraging its members to assimilate as much as possible into the prevailing heterosexual culture. The DOB advertised itself as "A Woman's Organization for the purpose of Promoting the Integration of the Homosexual into Society." When the club realized they weren't allowed to advertise their meetings in the newspaper, Lyon and Martin began to print the group's