The Grande Ballroom was one of the premier venues for Rock in the late 60's and early 70's. Check out this list of artists for 1968 and early '69.
Fleetwood Mac
Pink Floyd
Led Zepplin
Deep Purple
Canned Heat
Jefferson Airplane
Iron Butterfly
The Byrds
The Who
The Jeff Beck Group
The Electric Prunes
-The American debut of Tommy! The Who decided to have their premiere performance of "Tommy" at the Grande. They rehearsed there all week long, needing music stands to help them memorize the lyrics as they went. "Tommy" then debuted that weekend to packed crowds and an enthusiastic reception)
Blood, Sweat & Tears
Big Brother & The Holding Company
The Buddy Guy Blues Band
Joe Cocker
The Amboy Dukes
John Mayall's Bluesbreakers
The Rationals
MC5
Spirit
Country Joe & The Fish
The Youngbloods
The James Gang
Traffic
Procol Harum
B.B. King
Eric Clapton sat in with John Mayal
Ten Years After
Eric Burdon & the Animals
The Grateful Dead
Sly & The Family Stone
The Paul Butterfield Blues Band
The Crazy World of Arthur Brown
Cream
The Moody Blues
Blue Cheer
Tim Buckley
Wayne Cochran
James Cotton Blues Band
Albert King
The Mothers of Invention
Jethro Tull
Three Dog Night
Velvet Underground
Chuck Berry