A 31-year-old man was fatally shot during a clash in a Brooklyn nightclub early Sunday, police said.

Jordan Amador was shot once in the chest inside Socialites Lounge, an Afro-Caribbean bar/restaurant, on Atlantic Ave. near Washington Ave. in Clinton Hill about 3:10 a.m., cops said.

An argument had broken out inside, police sources said.

Medics rushed Amador to New York-Presbyterian Hospital Brooklyn Methodist, but he could not be saved, cops said.

There were no immediate arrests.

The lounge was left littered with blood and broken bottles as cops investigated.

Amador lived in East Flatbush, according to cops.