It his 2019 autobiography Me, Elton John talks about spending time with John Lennon during Lennon's so-called "Lost Weekend:
We began spending a lot of time together, whenever I was in America. He'd separated from Yoko and was living in Los Angeles with May Pang. I know that period in his life is supposed to have been really troubled and unpleasant and dark, but I've got to be honest, I never saw that in him at all. I heard stories occasionally -- about some sessions he'd done with Phil Spector that went completely out of control, about him going crazy one night and smashing up the record producer Lou Adler's house. I could see a darkness in some of the people he was hanging out with: Harry Nilsson was a sweet guy, an incredibly talented singer and songwriter, but one drink too many and he'd turn into someone else, someone you really had to watch yourself around. And John and I certainly took a lot of drugs together and had some berserk nights out, as poor old Dr. John would tell you. We went to see him at the Troubadour and he invited John onstage to jam. John was so pissed he ended up playing the organ with his elbows. It somehow fell to me to get him offstage.
