Undiscovered NYC: Which Of These Secret Bars Do You Know Of?

As humble and welcoming New York City is to newcomers and strangers, it remains loyal to locals. There are some places in the city that are discovered not on your fifth walk along 13th Street, but when you have been living there for 10 years, and stumble upon a secret spot on your morning run along a path you take everyday. This is why even when open and visible to the entire world, New York City delves into its own secrets. 

There are numerous little, dingy bars in the city that not even all locals know of. They are hidden in corners, guarded by secret entrances and hidden passages. Which of these undiscovered bars in New York have you visited, or just heard of?