But though major sports venues and a growing number of smaller New York businesses are embracing using the app, the vast majority of businesses are not requiring any proof of vaccination to enter. (The state would not say how many businesses had signed up.) For those that take the Excelsior Pass, paper vaccine cards must also be accepted as a form of proof, the state said. Some businesses — especially those catering to adult audiences, like arts venues — are jumping into the world of verification. Aside from accepting the Excelsior Pass, City Winery in Chelsea, for example, also uses the CLEAR Health Pass as a way to verify health and vaccination status. Gov. Andrew M. Cuomo has encouraged the move toward fully vaccinated crowds by permitting businesses to disregard social distancing if everyone is vaccinated.