Shake Shack opened its first Orange County location at the Irvine Spectrum, next to the Regal Edwards Theater. Customers visiting the new store can expect the traditional Shake Shack experience but with the added flare of Orange County culture. The 3,000 sf restaurant features décor from local artists and unique menu items like the OC Dreamsicle Shake; a vanilla custard and orange soda shake meant to transport customers to the beach with one sip…