Among the girls allegedly recruited by the trio for parties at billionaire Berlusconi's villas was Moroccan-born Karima El-Mahroug, a then 17-year-old exotic dancer nicknamed "Ruby the Heart Stealer".
Berlusconi was sentenced in a separate trial in June to seven years in jail for paying for sex with Ruby and abusing his power to hide the liaison -- though the punishment was suspended on appeal.
The Milan court Friday banned Moro and Fede for life from holding public office and working with minors, while Minetti was given a five-year ban on holding public office.
All three were ordered to pay court costs.
In his summing up speech in May, prosecutor Pietro Forno said the three had arranged "orgies" at Berlusconi's mansion and cited the tycoon's ex-wife Veronica Lario, who accused her then husband of consorting with "young virgins".
His colleague Antonio Sangermano said the three were like "tasters of fine wine" and had obtained financial advantages from Berlusconi because "they know all the secrets" of those nights.
"They carried out a sort of exam of the capacities of the young women and then injected them into the circuit of soirees," Sangermano said. Minetti was also an active participant and "performed sexual acts for money," he said.
All three denied the charges, insisting that while they may have invited girls to the premier's Milan villas, it was to attend nothing more than elegant dinner parties.