Slut Night is a Butch-Femme social gathering to celebrate gender expression and the Butch and Femme gender roles. Slut Night had its origins in San Francisco, and has spread across the United States. On "Slut Night" at a bar or other social meeting place, Femmes tend to dress in bustiers, corsets, and boas, with the Butches dressed in male suits and ties.
One of the most special aspects of the online Butch-Femme community is the way in which its members find to bridge the chasm of cyberspace and meet "in real time." The annual "Butch-Femme.com Bash" is a weekend convention held once a year in different cities across the United States to celebrate the Slut Night tradition.