| Business | Phone |
| Foothill School-Self Defense 9385 Old State Hwy, Newcastle 95658 | (916) 663-4787 |
| Newcastle Ringside Gym 9385 Old State Hwy, Newcastle 95658 | (916) 663-1022 |
| Woodallf School-Self Defense 9385 Old State Hwy, Newcastle 95658 | (916) 663-4787 |
| Clarks Martial Arts Center 9385 Old State Hwy, Newcastle 95658 | (916) 663-2340 |