| Business | Phone |
| Audio Visual One Ltd 121 N Jefferson St, Chicago 60661 | (312) 559-1060 |
| Essanay Studio Lighting Inc 1346 N North Branch St, Chicago 60622 | (312) 664-4400 |
| Chicago Studio City 5660 W Taylor St, Chicago 60644 | (773) 261-3400 |
| Dg Fast Channel 200 W Monroe St 2000, Chicago 60606 | (312) 454-5450 |