In Paris, Dietrich had an affair with Suzanne Baulé, known as Frede, a coach and cabaret hostess whom she met in 1936 at the Monocle, a women's nightclub on Boulevard Edgar-Quinet in Paris. The two women remained friends until the 1970s, as can be seen in the correspondence kept in the Marlene Dietrich archives in Berlin. In the early 1940s, Dietrich also had an affair with Cuban-American writer Mercedes de Acosta, who claimed to be Greta Garbo's lover. "Sewing circle" was a phrase used by Dietrich to describe the underground, closeted lesbian and bisexual film actresses and their relationships in Hollywood. In the supposed "Marlene's Sewing Circle" are mentioned the names of other close friends such as Ann Warner (the wife of Jack L. Warner, one of the owners of the Warner studios), Lili Damita (an old friend of Marlene's from Berlin and the wife of Errol Flynn), Claudette Colbert, and Dolores del Río (whom Dietrich considered the most beautiful woman in Hollywood). The French singer Edith Piaf was also one of Dietrich's closest friends during her stay in Paris in the 1950s, and there were rumors of something more than friendship between them.