Dance Marathons

Dance marathon couple, ca. 1925
Library of Congress

HistoryLink.org:

Dance Marathons (also called Walkathons), an American phenomenon of the 1920s and 1930s, were human endurance contests in which couples danced almost non-stop for hundreds of hours (as long as a month or two), competing for prize money. Dance marathons originated as part of an early-1920s, giddy, jazz-age fad for human endurance competitions such as flagpole sitting and six-day bicycle races. Dance marathons persisted throughout the 1930s as partially staged performance events, mirroring the marathon of desperation Americans endured during the Great Depression. In these dance endurance contests, a mix of local hopefuls and seasoned professional marathoners danced, walked, shuffled, sprinted, and sometimes cracked under the pressure and exhaustion of round-the-clock motion. A 25-cent admission price entitled audience members to watch as long as they pleased.

I remember watching They Shoot Horses, Don't They? when I was a kid and being considerably weirded out by the whole idea.

via Blue Siren