The Bowie thread helped me find this Guitar Player story about David trying to borrow/steal Frank's guitarist:
Thanks to Brian Eno’s advice after seeing Adrian Belew onstage during a Frank Zappa concert, Bowie offered to hire Belew once the Zappa tour was finished. Belew recalled on his Facebook page how he met Bowie in Berlin during one of the shows.
“So I walked over to David Bowie, shook his hand and said, ‘I love what you’ve done, thank you for all the music.’ And he said, ‘Great, how would you like to be in my band?’ I motioned back towards Frank and said, ‘Well, I’m kind of playing with that guy.’ David laughed and said, ‘Yes, I know, but when Frank’s tour ends my tour starts two weeks later. Shall we talk about it over dinner?’”
Later, he said, “We arrived at the restaurant, went in the front door, and who should be sitting at the very first table but Frank Zappa and the rest of the band! So the three of us sat down with Frank and the band. David, trying to be cordial, motioned to me and said, ‘Quite a guitar player you have here Frank.’
“And Frank said, ‘#### you, Captain Tom.’ (Note: Frank had demoted David from Major Tom to Captain Tom.)
“David persisted, ‘Oh come on now Frank, surely we can be gentleman about this?’
“Frank said, ‘#### you, Captain Tom.’
“By this point I was paralyzed. David said, ‘So you really have nothing to say?’ Frank said, ‘#### you, Captain Tom.’
“David and Coco and I got up and went back out the front door. Getting in the limo David said in his wonderfully British way, ‘I thought that went rather nicely!’ ”