Back in 1969, the Who Opened Their North American Tour at the Grande Ballroom in Detroit on May 9-11. They returned again on October 11-12 that year. The surviving Who members visited the Joe on November 24, 2012 and mentioned that they shared the Rock Opera Tommy the first time at the Grande Ballroom.
Louder Than Love : The Grande Ballroom Story
Hopefully the owners did not have to consult the following government document:
Medical care at large gatherings : a manual based on experiences in rock concert medicine / by Gerald H. Dubin. [Washington] : U.S. Dept. of Health, Education, and Welfare, Public Health Service, Alcohol, Drug Abuse and Mental Health Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976. U.S. Government Documents Collection (3 West) HE 20.8208:M 46 Also available online from the Hathitrust