It happened at approximately 3.50am on Saturday 7 September in the Blackamoor pub on Finkle Street and involved member of staff being assaulted.
The victim received facial injuries which required hospital treatment.
Two men aged 36 and 39 were arrested and bailed whilst our investigation continues.
The police are particularly appealing for information from anyone who was in the pub at the time and witnessed the incident.
Please email Miriam.Mills@northyorkshire.police.uk if you have any information that could help the investigation.
Alternatively, you can call North Yorkshire Police on 101, and ask for Miriam Mills, or contact Crimestoppers anonymously on 0800 555 111 or via their website.
Please quote reference 12240162878 when passing on information.
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