From a fight club called "The Rumble in the Bronx" to a warehouse shooting in Los Angeles.
"These activities were illegal and sometimes deadly before COVID-19,' said New York City Sheriff Joseph Fucito.
Coast to coast, secret parties busted by cops like an alleged illegal bottle club with 120 people inside last weekend in New York City.
Deputies also shut down a swinger's club in New York City with 80 people inside.
RELATED: Another Marin County high school shuts down in-person learning after off-campus parties
"The best and most pragmatic method for deputy sheriffs to save lives is to maximize enforcement at these types of dangerous gatherings," Fucito said.
In Los Angeles, two warehouse parties in recent months led to two different shootings, exposing a reality that even in a pandemic people are determined to party.
Los Angeles police say many of the warehouses are falsely booked as video shoots.
"And then the fact that they're in industrial areas, you know, oftentimes they don't get the same kind of attention that you would get in a residential area," said Los Angeles Police Capt. Stacy Spell.
When asked what would LAPD tell these warehouse owners, Spell had this to say:
RELATED: 15 Texas relatives sick with COVID-19 after party 'feel guilty'
"We ask them to ask more questions, to be more selective and to try to better identify what the purpose of that is going to be."
The extent of the problem here is unknown, but on the same night of a warehouse shooting two weeks ago, there were social media posts from this gathering in Downtown Los Angeles.
The parties are often organized online with no location given until hours before the event.
LAPD says in an era of police reform the department must think hard about sending an armed officer to a gathering where no additional crimes are reported.
"And so in those instances where a response would be more geared towards public health issues, or we could direct, you know, unarmed response through, we have partners in the fire department," Capt. Spell said. "There are other entities that could better respond to those kinds of things."
A curfew in Los Angeles County may have had an impact.
RELATED: Marin Catholic High School closes after large party, 'countless' reports of student sleepovers
In California, raves were held outside in San Bernardino County, where the local health department says it approves and monitors them.
But in the cold weather of New York, "The sheriff's office will be concentrating on large-scale gatherings," Fucito said.
VIDEO: Here's how shelter in place, stay at home orders can slow spread of COVID-19
If you have a question or comment about the coronavirus pandemic, submit yours via the form below or here.
Get the latest news, information and videos about the novel coronavirus pandemic here
RELATED STORIES & VIDEOS:
- Map: CA counties that can, can't reopen under new rules
- COVID-19 risk calculator: The safest and most dangerous things to do this holiday season
- Want to get a COVID-19 test in time for the holidays? Here's what you need to know
- Updated number of COVID-19 deaths, cases in Bay Area
- Map shows everywhere you can get a COVID-19 test in the Bay Area
- COVID-19 Diaries: Personal stories of Bay Area residents during pandemic
- California EDD: The most commonly asked questions we get about unemployment and PUA
- Health experts urge flu shots in effort to avoid 'twindemic'
- How to tell the difference between seasonal allergies and coronavirus symptoms
- Here's which mask is better to protect from COVID-19
- First COVID-19 vaccine volunteers in US describe experience as Bay Area launches vaccine trials
- Coronavirus origin: Where did COVID-19 come from?
- What is a COVID-19 genetic, antigen and antibody test?
- What will it take to get a COVID-19 vaccine and how will it be made?
- What does COVID-19 do to your body and why does it spread so easily?
- Here's how shelter in place, stay at home orders can slow spread of COVID-19
- Coronavirus Timeline: Tracking major moments of COVID-19 pandemic in San Francisco Bay Area
- Coronavirus Doctor's Note: Dr. Alok Patel gives his insight into COVID-19 pandemic
The-CNN-Wire & 2020 Cable News Network, Inc., a WarnerMedia Company. All rights reserved.