 It featured many leading exponents of progressive rock, such as Frank Zappa, Pink Floyd, Captain Beefheart, Soft Machine, Ten Years After, Yes and The Nice.The festival was a popular success, with around 20,000 visitors over five nights, but it was a financial failure.In July 1970, Georgakarakos organised the Popanalia festival at Biot on the French Riviera, but this was also financially unsuccessful.