Police were called to Brady’s wine bar in Queen Street at around 12-45am after an altercation involving a number of people.
One man was arrested and charged with being drunk and disorderly and he was issued with a fixed penalty notice.
A woman was also arrested and charged with assaulting a police officer. She was issued with an adult caution.
Inspector Ian Cooper of Clitheroe Police said investigations into the incident were continuing and further arrests could be made.