Calderon, Ronaldo, Zinedine Zidane and Christian Karembeu were all together to support a UN charity match in Morocco.
Florentino told Zidane: "The way you look, you should be still playing."
Zizou replied: "Florentino, if you return, I will make a comeback!"
Asked about Real Madrid's current crisis, the Frenchman laughed: "You'd better ask Ronaldo."
The Brazilian declared: "Schuster's not to blame for what is happening, the problem lies elsewhere ..."
Meanwhile, Karembeu declared Real could solve their problems by signing more French players.
"Karim Benzema (Lyon) and Yoann Gourcuff are the signings for this club," said the former midfielder. "Gourcuff is from Milan, but was loaned to Bordeaux, he has all the technical qualities of Zidane, he plays like him and would be a good signing."