The lounge, on Albemarle Street, follows openings in cities such as Milan, Madrid and Paris.
The collection is being rolled out in stores now and the collaboration has helped the Italian brand develop a younger customer base.
The Oscar winners promoted gender parity and inclusivity for women and people of color, both on screen and off, also championing journalists.
The Italian brand celebrated its 16-year-old Hollywood initiative with Women in Film by toasting the 2018 honoree, actress Alexandra Shipp.
The London-based artist was awarded a six-month residency in Italy.
The crowd included nominees Margot Robbie, Greta Gerwig, Mary J. Blige, Rachel Morrison and Emily V. Gordon, plus Oscar-winner Viola Davis.
The actress, who is expected to attend the Italian brand’s fashion show on Feb. 22, will be honored at the 2018 Women in Film Crystal + Lucy Awards in June in Beverly Hills.