Guests on the patio/porch require a check back to receive service.

In this context, the statement indicates that guests seated on the patio or porch do not require a check back in order to receive service. This suggests that service to these guests can be initiated without needing a server to return to them for their requests, which could mean service is more flexible or that it follows a different protocol than what's typically practiced.

Considering the service style at Sonic, it’s common that guests at certain locations or seating arrangements may have systems in place to ensure they receive service promptly without the need for a server to check back. This could relate to how orders are taken or how guests signal for assistance.

The idea that some guests might require a check back only during specific situations—like peak hours or when they are new—does not capture the standard policy for patio or porch service. The overall premise emphasizes that checking back isn't necessary, regardless of the circumstances suggested in the other options.