Mary Church Terrell was an African-American civil rights activist. She fought to desegregate Washington D.C.
In 1949, when she and others visited a segregated popular restaurant, John R. Thompson Co., Inc., they refused to serve those who weren’t white. A lawsuit ensued that eventually reached the United States Supreme Court. The Court held that the restaurant’s refusal to serve anyone based solely on his or her race was illegal in D.C. You can read the opinion at https://goo.gl/JMSM9k.