Is the City Winery in New York City an all-ages venue?

I’m about to reserve seats for Hawksley Workman’s show at the City Winery, but the people in my party are under 21, so I don’t want to waste the money if we can’t get in. Does anyone know whether it varies by show, or if the venue is all ages, 18+, or 21+?

I tried to call them, but was unable to get through the automated system to an talk to an actual person. Any help would be appreciated!