Complex sentence: By 1928, there were from 16,000 to 25,000 speakeasies and clubs in the Windsor-Detroit area, located in slums as well as in some of Detroit's most prestigious neighborhoods.
Split into simpler sentences: By 1928, there were anywhere from 16,000 to 25,000 speakeasies and clubs in the Windsor-Detroit area. Clubs were located in slums and in some of Detroit's most prestigious neighborhoods.