| Quartet | Chapter | Area of operation | State |
| By Special Request | Chapter-at-Large Region 11 | California | |
| Crush | Chapter-at-Large Region 11 | California | |
| Eclectic Mix | Verdugo Hills Chapter of SAI | California | |
| Four the Most Part | Verdugo Hills Chapter of SAI | California | |
| Hot Topic | Verdugo Hills Chapter of SAI | California | |
| Joyful | Celebrity City Chapter of SAI | Nevada | |
| Precious Gems | Verdugo Hills Chapter of SAI | California | |
| StarFire | Lady Luck Showtime Chorus Chapter of SAI | Henderson, NV | Nevada |
| SwingTime- 2019, 2022 & 2023 Region 11 Quartet Champions | Carpe Diem Chapter of SAI | California | |
| Take Note | Lady Luck Showtime Chorus Chapter of SAI | Henderson, NV | Nevada |
| The Valkyries | Chapter-at-Large Region 11 | California | |
| This Is Us | Carpe Diem Chapter of SAI | California | |
| Troubadour | Santa Monica Chapter of SAI | California |
