In the course of the 1970s, disco music was developed further mainly by artists from the United States and Europe. Well-known artists include: ABBA, the Bee Gees, Donna Summer, Gloria Gaynor, Giorgio Moroder, Baccara, Boney M., Earth Wind & Fire, Chaka Khan, Chic, KC and the Sunshine Band, Thelma Houston, Sister Sledge, Sylvester, The Trammps and the Village People .While performers garnered public attention, record producers working behind the scenes played an important role in developing the genre. By the late 1970s, most major U.S. cities had thriving disco club scenes, and DJs would mix dance records at clubs such as Studio 54 in Manhattan, a venue popular among celebrities.