There’s little formal research on non-monetary incentives, like drag queens, mariachi bands, churros and beer, said Glen Mays, who is chair of the Department of Health Systems, Management and Policy at the Colorado School of Public Health. But the good news is he expects even clinics that vaccinate relatively few people will generate ripple effects. “People who get vaccinated through these kinds of special events, they’re connected to friends and colleagues. And having a friend who’s been vaccinated, having a social contact, who’s been vaccinated, raises those other social contacts’ likelihood of being aware of and ultimately taking up the vaccine,” said Mays.