Dancers in Penn Station

The lower level of Penn Station is perfect for dancing and serving as a makeshift dance studio.

Penn Station, the transit hub for hurrying commuters and Amtrak riders, has a side gig. Its wide, lower level corridor — specifically the passageway leading to the Moynihan Train Hall from Track 7 to Track 16 of the Long Island Rail Road — is an unlikely dance studio.

Officially called the West End Concourse, the corridor has a lot going for it: It’s easily accessible, the floors are spacious and smooth, and there are public restrooms, a rarity in New York City.

It’s a ready-made stage for all sorts of group and partnered dance, including hip-hop, K-pop and salsa. Reflective glass windows overlooking the tracks double as mirrors. Rows of blue lights overhead make for pleasing visuals when filmed. The biggest draw? It’s free.