| Business | Phone |
| Kappa Search Inc 600 Hunter Dr, Oak Brook 60523 | (630) 368-1164 |
| Oak Brook Bath & Tennis Club 800 Oak Brook Rd, Oak Brook 60523 | (630) 990-3025 |
| Royal Hills Club 3525 S Cass Ct, Oak Brook 60523 | (630) 734-3401 |
| Traffic Club Of Chicago 600 Enterprise Dr 106, Oak Brook 60523 | (630) 573-1333 |