Police are appealing for witnesses to an assault on a member of staff at Wetherspoons pub in Cornfield Terrace.
The victim was collecting glasses when a dispute broke out at about midnight on Saturday (August 31). He attempted to break up the fight and was punched in the face.
A 21-year-old man and two women also aged 21, all from Eastbourne, were all arrested on suspicion of causing actual bodily harm. They were questioned and released on bail until September 22.
Anyone who witnessed the incident is asked to call police on 101 quoting serial 1888 of 31/8 or email firstname.lastname@example.org Alternatively, call the independent charity Crimestoppers anonymously on 0800 555111.