Dorothy Engel Andre was born June 25, 1898 in New York City, New York to Samuel and Merel Engel. She studied at an all-girls school in Virginia before moving to Astoria, Oregon with her sister. In 1920, she met Joseph (Joe) Otto Andre at a hospital and soon after the couple got married and had one daughter named Ruth.

Arthur “Art” Sloan (1930-2019) was a philanthropist and a successful entrepreneur who ran multiple businesses that specialized in lighting and air conditioning. During his time in Las Vegas, Nevada, Sloan collected materials from casinos such as the Flamingo, El Rancho, and Hotel Last Frontier. These materials included ash trays, silverware, postcards, photographs, dice, playing cards, and casino memorabilia.