| Business | Phone |
| Abidor Avgusta Piano & Voice 920 San Simeon Dr, Concord 94518 | (925) 687-0334 |
| Audrey Hunt Vocal Co Po Box 273827, Concord 94527 | (925) 930-8598 |
| Dahlia's Rising Stars 1604 Lindbergh Dr, Concord 94521 | (925) 798-7464 |
| Joyce Pricco Vocal Instruction Concord 94520 | (925) 682-6228 |
| Meherkeran Sings-Karen Sterkin Concord 94520 | (925) 676-7849 |