Joining Perez is The Upbeats ft MC Tiki, Chiccoreli & Tali, Dylan C, Coco, Sanoi, Heylady, Ludus, Cooper Khan, Jake Rattler, Mia Gober and Drifty.
The next day would be family-friendly with a "roots reggae feel", Damosso said.
The events at Majestic Square have a capacity of 400. Photo / Bevan Conley
Kora, Tiki Taane, Modern Maori Quartet, Lost Tribe Aotearoa, Roots Providers and Ihaka make up the lineup.
The next instalment will be in February and features a day of rock acts before female musicians take centre stage as part of La Fiesta Woman's festival.
Hip hop and alternative artists round out the events at the end of March.
One of those is Maria Lane Eatery and Bar, which is opposite the square's stage.
Owner Bryce Mason said Damosso had gone about things the right way when organising the events.
Maria Lane is hosting some of the artists for dinner and its new bar space will be used as a backstage/VIP area.
Drum and bass DJ Alix Perez will headline the first night of Summer in the Square. Photo / Supplied
"It's the classic scenario, if you're having an occasion you let your neighbours know," Mason said.
"You have to collaborate with local business and residents, with council coming in with the compliance side of things.
"These kinds of things get easier once you do them. As long as everyone is working together on a win-win basis, it should grow nicely."
Noise levels would be kept lower at the very start of the event when Maria Lane was still serving customers, Mason said.
"If you didn't do that and old mate turns up from Auckland with his heavy metal band and starts sound-checking during (dining) service, that's not really a good platform.
"Gioia has come and engaged with us, and that's awesome."
Damosso said she would try her best to have at least one Summer in the Square event free for the public next year.