| Business | Phone |
| Baker's Union 14144 Doolittle Dr, San Leandro 94577 | (510) 357-3201 |
| Laundry & Dry Cleaning Ind Svc 1155 E 14th St # 230, San Leandro 94577 | (510) 483-9222 |
| Probation Peace Officers Assoc 15251 Hesperian Blvd, San Leandro 94578 | (510) 317-5654 |
| Sheet Metal Workers Union 1750 Marina Blvd, San Leandro 94577 | (510) 895-8660 |
| Teamsters Union 2100 Merced St # B, San Leandro 94577 | (510) 895-8853 |
| United Furniture Workers 519 Estudillo Ave # O, San Leandro 94577 | (510) 352-9438 |
| United Steelworkers Of America 433 Callan Ave # 300, San Leandro 94577 | (510) 352-1304 |