U2 ranks 4th, Elton John ranks 5th and Bon Jovi ranks 8th.

FORBES: Will Lady Gaga Stay on Top?

Past performers, who are never announced until they take the stage, have included Diana Ross, John Mellencamp, Sheryl Crow, Faith Hill, Lionel Richie, Jon Bon Jovi, Paul Simon, Stevie Wonder and Elton John.

FORBES: Sting and James Taylor Perform At Baron Funds' 20th Annual Investment Conference

Playboy Club said about 850 people, including 350 women, have signed on as members, including Elton John's partner David Furnish and model Yasmin Le Bon.

BBC: Playboy Bunnies: Modern feminists or 'club decoration'?

One of those phone calls came from Mercury Records, which signed Bon Jovi to his first record deal that same year, prompting the singer to shorten his name from John Francis Bongiovi, Jr.

FORBES: Jon Bon Jovi's Star Wars Secret