Gregg Xenakes has 2 Grinspoon concerts.

Grinspoon are an Australian rock band from Lismore, New South Wales; formed in 1995 and fronted by Phil Jamieson on vocals and guitar with Pat Davern on guitar, Joe Hansen on bass guitar and Kristian Hopes on drums. Also in 1995, they won the Triple J-sponsored Unearthed competition for Lismore, with their post-grunge song "Sickfest". Their name was taken from Dr. Lester Grinspoon an Associate Professor Emeritus of Psychiatry at Harvard Medical School, who supports marijuana for medical use.