for lesbians, included the Daughters of Bilitis, formed in San Francisco in 1955. Members held public demonstrations, spoke to the media, and published a newsletter. Primarily associated with lesbians in North America, Europe, Australia, and New Zealand, lesbian culture has often involved large, predominantly lesbian "women's" events such as the Michigan Womyn's Music Festival (closed after 2015) and the Club Skirts Dinah Shore Weekend. Lesbian culture has its own icons, such as Melissa Etheridge, k.d. lang (butch), Ellen DeGeneres (androgynous) and Portia de Rossi (femme). Lesbian culture since the late 20th century has often been entwined with the evolution of feminism. Lesbian separatism is an example of a lesbian theory and practice identifying specifically lesbian interests and ideas and promoting a specific lesbian culture. Examples of this included womyn's land and women's music. Identity-based sports teams have also been associated with lesbian culture, particularly with the rise of lesbian softball teams and leagues in the 1980s and 1990s. Softball and other athletic teams created social community and allowed lesbians to reject social expectations of physicality, but were typically considered separated from lesbian feminism and political activism. 1950's and early '60s stereotypes of lesbian women stressed a binary of "butch" women, or dykes (who present masculine) and "femmes", or lipstick lesbians (who present feminine), and considered a stereotypical lesbian couple a butch-femme pair. In the 1970s, androgyny, political lesbianism, and lesbian separatism became more common, along with the creation of women's land communities. The late 1980s and '90s saw a resurgence of butch-femme, and influences from punk, grunge, riot grrrl, emo, and hipster subcultures. In the '00s and '10s, the rise of Non-binary gender gender identities brought some degree of return to androgynous styles, though at times with different intentions and interpretations than in the 1970s. Bisexual culture Bisexual culture emphasizes opposition to, or disregard of, fixed sexual and gender identity monosexism (discrimination against bisexual, fluid, pansexual and queer-identified people), bisexual erasure and biphobia (hatred or mistrust of non-monosexual people). Biphobia is common (although lessening) in the gay, lesbian and straight communities. Many bisexual, fluid, and pansexual people consider themselves to be part of the LGBTQ+ or queer community, despite any discrimination they may face. Western bisexual, pansexual, and fluid cultures also have their own touchstones, such as the books Bi Any Other Name: Bisexual People Speak Out (edited by Lani Kaʻahumanu and Loraine Hutchins), Bi: Notes for a Bisexual Revolution