The incident happened at the West Way Bar on Clarkson Street in the West Village around 4:20 a.m.
Authorities say the three men walked into the bar, displayed a gun and demanded money.
The victim complied, and the suspects fled with cash.
No injuries were reported.
Two of the suspects were caught on surveillance cameras, and police are hoping the images will lead to an arrest.
Anyone with information in regards to this incident is asked to call Crime Stoppers at 1-800-577-TIPS (8477).