North Park Main Street does not rent or reserve the new North Park Mini-Park. Having an event at the Mini-Park involves two entities: San Diego Park and Rec (for the park reservation and permit), and in some cases, San Diego Special Events Department (for the event permit).
The contact for City of San Diego Parks and Recreation Department is:
Center Director III
North Park Recreation Center
City of San Diego Parks and Recreation Department
Event producers may be required to obtain a permit from City of San Diego Special Events Department. The application can be found here: