On a Tuesday night shortly before Christmas 1956, Johnny Cash, Jerry Lee Lewis, Carl Perkins, and Elvis Presley gathered at Sun Records in Memphis, Tenn. This was their only performance together, a cultural flashpoint that caught rock ‘n’ roll at the moment of creation. Support American Theatre: a just and thriving theatre ecology begins with information for all. Please join us in this mission by joining TCG, which entitles you to copies of our quarterly print magazine and helps support a long legacy of quality…