Lin-Manuel Miranda Sings ‘New York, New York’ Outside ‘Hamilton’ Theater - The New York Times

He was there to lead a group of Broadway performers in a rendition of “Theme From ‘New York, New York,’” the anthem popularized by Frank Sinatra, creating a sort of mood-setting overture for the night ahead!

“Get a mask, get vaccinated and come see live theater!” said Miranda, who also played Alexander Hamilton in the original Broadway cast.

The appearance was not publicized until about 4 p.m., when Miranda tweeted a photo from inside the theater and announced a so-called Ham4Ham, which, before the pandemic, was a performance by “Hamilton” cast members outside the theater that accompanied a lottery for tickets to see the show.