Young father Ben Togiai, 30, was killed outside the boxing event, while his companions Omar Bchinnati and Joseph Abouchaya were wounded.
Four men – brothers Abdullah and Ali El Nasher and their friends, Mikhael Myko and Osamma Allouche – are charged over the shootings.
Police allege the two groups exchanged words before they were all asked to leave the event, and that outside the venue the El Nasher group fired upon Mr Bchinnati’s group.
Abdullah El Nasher and Mr Allouche are charged with murder and Ali El Nasher and Mr Myko are charged with attempted murder.
Brittany McGuire, who is Abdullah El Nasher’s partner, said she didn’t remember much of attending the boxing because she was drunk and “Xanied”, having taken half a Xanax and three Valium in the hours beforehand, and drinking wine and vodka.
She said she took Valium and Xanax for depression and anxiety.
Ms McGuire repeatedly wouldn’t give prosecutor Neill Hutton a straight answer on the type of car she, her partner and Ms Pericic travelled in that night, or what car her partner regularly drove.
“I was really drunk … I was Xanied,” she said.
Ms Pericic said she took eight Valium that evening and drank “bottles of wine” and “straight scotch”, and believed she was “10 out of 10” drunk.
“I was very Valied. I don’t remember much,” she said.
She couldn’t recall if there were any words or threats exchanged inside the venue between her group and Mr Bchinnati’s group or if there was any friction.
“I didn’t really pay any attention to anyone else but myself,” she said.
Ms Pericic said at one point she returned to her table to find all the men had left, so she skolled a bottle of wine and went to the building’s front doors, where people were yelling and screaming.
“There was just a lot of commotion and I just wanted to walk out and know what was happening,” she said.
“I was very tipsy, I was very drunk. I just remember people screaming and yelling and people pulling people back inside.
“I seen someone point something at Brittany and Myko and … I got pulled back inside.”
Ms Pericic said she couldn’t identify the man who was pointing the object at Ms McGuire and Mr Myko, or what the object was.
Ms Pericic said that in the following minutes, Ms McGuire’s uncle, Horty Mokbel, grabbed her and escorted her out of the building. She then met up with Ms McGuire and her friend’s cousin, Anthony Mokbel.
“It was a very scary situation,” she said.
The trio took a taxi to Anthony Mokbel’s car, Ms Pericic said, and drove to Ms McGuire’s Port Melbourne apartment, where the friend passed out.
Police allege the four accused men drove away after the shootings. They watched the hearings via videolink on Tuesday and laughed as Ms Pericic outlined what she drank that night.
Ms McGuire, who had her mother in court, will continue her evidence on Wednesday.
Khaled El Nasher, a brother of the accused men, avoided giving evidence on Tuesday by agreeing to give a statement to police.
Mr Bchinnati, Mr Abouchaya, associates of the accused men, and patrons are among the others who have been ordered to be at court this week.
Adam Cooper joined The Age in 2011 after a decade with AAP. Email or tweet Adam with your news tips.