Denver: A man was killed and five other people were injured in the shooting in the Denver nightlife district as well as the bar closed on weekends, police said.
The shooting took place around 2am in the corner near the music hall and nightclub in the lower city center in the city center.
The identity of the dead man was not published and no arrest was made, the police said in a tweet.
The authorities did not say whether they had identified the suspect.
None of the injured people have injuries that are considered to be life-threatening, police said.
The murder came more than two weeks after a man was killed and the others were injured in the shooting outside the coors field when fans left the baseball stadium after the Colorado Rockies match.