Police had to break up four parties held in a Liverpool city centre hotel.
Officers made the discovery of a combined 200 people attending private gatherings inside the Richmond Hotel at around 3.15am on Sunday.
They also found evidence of on-side drug use within the Hatton Garden venue, where 13 fixed penalty notices were issued and two arrests made.
One woman was detained for two counts of assaulting a police officer while a man was arrested in connection with an existing warrant.
The gatherings were in clear breach of the UK’s latest coronavirus national lockdown restrictions, which passed into law on January 6 this year.
“After reviewing our CCTV which runs non-stop throughout the hotel and talking to our team we can confirm that police stopped outside the hotel when a few guests where outside smoking and began questioning them,” a hotel spokesperson confirmed.
“This led to the police entering a room in the hotel which had circa 12 guests in. Not 200.
“The police then did their job and removed people issuing fines, one individual was refusing to leave and made a scene, she was then arrested.
“We have the utmost respect for the work of Merseyside Police.”
Hours before uncovering the latest infractions, police had stumbled upon another illegal gathering at the Shred Fast Gym on Long Lane in Aintree.
The 20 people inside were not wearing PPE or practicising social distancing with some said to have travelled there from Southport, Widnes and Wirral.
Merseyside Police issued 19 fixed penalty notices and reported the business owner to the local authority for being the organiser of the event.
Chief Superintendent Matt Boyle said: “We are currently in a national lockdown which means people should not be leaving their homes for non-essential reasons or meeting up with other people outside their household or support bubble.
“This sort of behaviour is unbelievable and unacceptable and officers should not be confronted with abuse and violence when attempting to uphold the law which most people are rightly abiding by.
“I would continue to ask people to please consider their own safety and that of their loved ones. We are all in this together and the laws apply to everyone.
“We all need to do everything we can to protect the NHS and our frontline staff during this deadly pandemic and we will not hesitate to take action when we believe people are flouting the rules.”