Pacific Drive-Ins currently owns and operates 15 Sonic Drive-In locations across San Diego, Riverside, Orange, Los Angeles, S ... acramento and San Bernardino Counties out of our Corporate HQ in Carlsbad, CA. Looking to pioneer a new brand in San Diego County, the Company’s Founding Partners identified Sonic Drive-In as one that could flourish in the area. Although exclusivity is not a normal practice, the people at Sonic could not ignore the vision of the Founding Partners, and granted them a multi-location franchise license with exclusivity in San Diego County. Sonic has since granted additional development territories in Riverside, Orange, Los Angeles, and San Bernardino Counties, as well as Greater Sacramento, due to the Company’s demonstrated operational excellence. read more