A dance party at The Raven night club in the Meatpacking District erupted into a literal Champagne “bash” — when a man whacked a reveler over the head with a bottle of bubbly, law enforcement sources said.

Cesar Garu, 26, was on the dance floor with a gal pal at the trendy club on Gansevoort Street near Greenwich Street on Aug. 31 at 2:55 a.m., when Guy Gubani, 23, grabbed the woman’s arm, law enforcement sources said.

Garu stepped in to stop him and, after a scuffle, Gubani allegedly hauled off and smashed him with the bottle of booze — leaving him with a swollen head and a bloody gash above his lip, the sources said.

The violent jerk’s pal Joshua Sharon, 23, also punched Garu, law enforcement sources said.

Gubani was charged with two counts of assault, one a felony and the other a misdemeanor.

Sharon was charged with misdemeanor assault and resisting arrest.