the Breadfruit and Rum Bar, declined unemployment insurance, and have shied from signing up for a shot. “Before you can even make an appointment you have to put in your name and date of birth and email,” Ms. Leoni said. “Those are questions that are deterrents for people trying to keep a low profile.”

In Charleston, Mr. Shemtov was inspired by accounts of the immunization program in Israel, which was considered successful in part because the government took vaccines to job sites. “If people can’t get appointments, let’s bring them to them.”

Other restaurants are devoting hours to making sure workers know how to sign up, locating leftover shots and networking with their peers. Some offer time off for a shot and the recovery period for side effects.

Katie Button, the owner of Curate and La Bodega in Asheville, N.C.

Still, some owners are not taking chances. “If we go out of business because we are one of the few restaurants in Arizona that won’t reopen, so be it,” Ms. Leoni said. “Nothing is more important than someone else’s health or safety.”

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