If you want to continue dining indoors at restaurants you might want to carry proof that you’re vaccinated. As the Delta variant of the coronavirus continues to spread through many parts of the US, the CDC updated its mask guidelines this week, and businesses, universities, and government agencies followed suit. In New York City, Union Square Hospitality Group, which owns three city restaurants, says it will now require patrons to show proof of their vaccination status upon arrival if they want to eat or drink indoors. The group will accept a physical vaccine card or a photo of one; New York State’s vaccine passport, Excelsior Pass; or other state vaccine passes. The SF Bar Owner Alliance, a group of 500 bars in San Francisco, also announced this week it will require customers to show proof of vaccination or a negative COVID test noting it’s “extremely concerned by a recent uptick in cases of COVID-19 among our staff members, especially those who are fully vaccinated.” The changes come amid lagging vaccination rates and surging cases in many parts of the US.