This shot is from RCA Studio B in Nashville.
The studio produced hits by Elvis, Dolly, The Everly Brothers, Chet Atkins, etc..

What is incredible is that Elvis recorded "It's Now or Never", "Fever",
"Are You Lonesome Tonight", and several other songs in one
marathon session lasting from 7:30PM (April 1, 1960) to 7:00AM (April 2nd).