From left to right: Colin Finn, Dave Petrizzo, Patrick Reynolds and Joe Kentos, members of the band “SPREAD,” perform Sept. 19 at Hangar 9. “It’s about listening to your fellow band mates, sometimes even more so than yourself,” Finn said. “Improvisational music is like having a conversation, but this conversation involves four or more people talking at the same time. We just need to be careful not to ‘talk’ too much or over each other. Other times, the rules of conversation are completely out the window and chaos is the ultimate goal.”