If they are in a public building with public access, so not in a restricted area, then recordings can be made. CA does have additional protections even in publ

If they are in a public building with public access, so not in a restricted area, then recordings can be made. CA does have additional protections even in public concerning “confidential communications” which likely prohibit covert recording. https://www.dmlp.org/legal-guide/california-recording-law https://www.dmlp.org/legal-guide/california-recording-law