I believe that saw Wet Willie open for the Allman Brothers on MY birthday, December 31, 1972 at the Warehouse. They recorded “Drippin Wet” that night. The Allman Brothers played well into the wee (4:am) hours and I sure don’t remember Elvin Bishop being there. I stayed till they shut the band couldn’t play anymore and they Warehouse doors. So you might want to check your date info on this.