RANCHO SANTA MARGARITA

The South Orange County Chambers of Commerce and Rancho Santa Margarita Chamber of Commerce will host a business after-hours mixer from 5:30 to 7:30 p.m. Wednesday at South County Bank, 30021 Tomas St., Suite 300. The cost is $8 for chamber members and $10 for guests. Information: (949) 830-1100.