Gay balls, cross-dressing balls or drag balls, depending on the place, time, and type, were public or private balls, celebrated mainly in the first third of the twentieth century, where cross-dressing and ballroom dancing with same sex partners was allowed. By the 1900s, the balls had become important cultural events for gays and lesbians, even attracting tourists. Their golden age was during the Interwar period, mainly in Berlin and Paris, even though they could be found in many big cities in Europe and the Americas such as Mexico City and New York City.

The first homosexual movement was a socio-political movement which thrived in Germany from the late nineteenth century until 1933. The movement began in Germany because of a confluence of factors, including the criminalization of sex between men and the country's relatively lax censorship. German writers in the mid-nineteenth century coined the word homosexual and criticized its criminalization. In 1897, Magnus Hirschfeld founded the world's first homosexual organization, the Scientific-Humanitarian Committee, whose aim was to use science to improve public tolerance of homosexuality and repeal Paragraph 175. During the German Empire, the movement was restricted to an educated elite, but it greatly expanded in the aftermath of World War I and the German Revolution.