https://www.siliconvalley.com/2021/07/26/breaking-300-san-francisco-bars-will-require-vaccine-proof-from-patrons/

To protect employees and customers, the San Francisco Bar Owner Alliance — a group that represents 300 businesses in this tourism-dependent city — announced Monday that its members have decided to limit indoor service to those who have been vaccinated or can prove they are COVID-free.

“Effective Thursday, July 29, it will be the official position of the SF Bar Owner Alliance that any customer who wishes to remain inside our establishments show proof of vaccination or a 72-hour negative COVID-19 test,” the group’s statement reads. “Guests without these verifications are welcome to sit outside in parklets or other spaces we offer.”