Three people were taken to hospital after the fight at the Ramada Park Hall Hotel, Park Drive, on Saturday evening.
Nine 999 calls were made from the Grade II-listed 4-star hotel after trouble flared at around 9.30pm.
Footage shown on social media showed the group fighting in one of the function rooms as staff urged them to call down.
No-one has reported being assaulted, West Midlands Police confirmed, despite the video clearly showing multiple people throwing punches inside and outside the venue.
One of the men involved can be seen continuing to brawl next to the stage as blood pours out of his head onto his white shirt.
Now the family of the wedding party have agreed to make amends to the venue.
A spokesman for the Ramada Park Hall Hotel said: "Fortunately, there hasn’t been any lasting damage and the room has been fully reinstated.
"The families of the bride and groom have offered to pay for the damages in full."
A teenage girl, who had been working at the event, was treated at the scene for her injuries and taken to New Cross Hospital in the aftermath.
Two men, in their 20s, were taken to the same hospital with injuries from the brawl, with another in his 40s refusing hospital treatment.
The spokesman added hotel staff "did exactly the right thing" to alert the emergency services, adding: "With any large events we have security on the premises. However, we do not expect our staff to put themselves at risk under any circumstances."
Anyone with information is asked to contact the force via live chat at www.west-midlands.police.uk between 8am and midnight, or by calling 101 anytime.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.
Quote crime reference 20WV/241903A/19.