North Yorkshire Police said criminal damage was caused to a restaurant on Cheltenham Parade during the incident.
It happened between 8pm and 8.10pm on Sunday April 23, but police only released details today.
A North Yorkshire Police spokesman said: "It involved a violent disorder between a group of men and women, resulting in criminal damage being caused to a local restaurant
"We are conducting enquiries and are requesting the public’s assistance to help determine the full circumstances surrounding the incident.
"Anyone with information that could assist the investigation should contact us on 101, select option 2, and ask for Nigel Bryan. You can also email [email protected]
"If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.
"Please quote the North Yorkshire Police reference number 12170069477."