| Business | Phone |
| Boustead Event Svc 2851 Nw 94th St, Seattle 98117 | (206) 297-4456 |
| Convention Services Northwest 1809 7th Ave 1414, Seattle 98101 | (206) 292-9198 |
| Group Planning Specialists Inc 2900 Westlake Ave N 100, Seattle 98109 | (206) 284-1090 |
| Idm-Intl & Domestic Meetings 8826 26th Ave Ne, Seattle 98115 | (206) 525-4527 |