Among the attendees were Bianchi, Chilton, Rossi, Kovalainen, Valsecchi, Gene, Button, Hamilton, Buemi, Rosberg and Perez.
Dutchman recently dismissed rumours former Caterham racer Kovalainen was set to replace him later in 2013.
Giedo van de Garde: Last year it was a little too dark, which sometimes didn't look good on TV.
"This is the state of Formula One right now where unfortunately sometimes the budget plays a large part in your decision making." - Tony Fernandes