Based on the provided content, there is no specific formula or fixed ratio mentioned to determine exactly how many security guards are required for a 500-person event.

Instead, the documentation explains that staffing requirements are determined through a personalized, custom-quote process. The number of guards needed is tailored based on several factors, including:

• Event Scale and Size: The total number of attendees.
• Risk Profile: The specific level of risk associated with the event type.
• Venue Unique Needs: The layout and location of the venue (e.g., Vancouver, Surrey, or Burnaby).
• Operational Requirements: Specific tasks such as access control, perimeter monitoring, or concierge integration.

Regent Security provides free, no-obligation custom quotes to help organizers develop the right security plan for their specific attendee profile. For large-scale events, they recommend booking at least two weeks in advance, though they can often accommodate urgent requests through same-day deployment of their team of over 100 licensed professionals.

• Event Security Companies BC: Top Vancouver Security Services