Airbnb is banning house parties worldwide as it tries to clean up its reputation and comply with coronavirus-related limits on gatherings.
The US home sharing company will limit occupancy in its rental homes to 16 people.
It may offer exceptions for boutique hotels or other event venues.
Airbnb said it may pursue legal action against guests and hosts who violate the ban.
Last week, for the first time, Airbnb took legal action against a guest who held an unauthorised party in Sacramento County, California.
Airbnb has always prohibited unauthorised parties and the company said nearly 75 per cent of its listings explicitly ban parties.
Last November, Airbnb started manually reviewing US and Canadian reservations to weed out suspicious rentals, like a guest who booked a one-night stay close to their home.
It expanded that program to Australia last week.
In July, Airbnb banned US and Canadian guests under age 25 with fewer than three positive reviews from booking entire homes close to where they live.
It expanded that policy to the United Kingdom, Spain and France last week.
Airbnb said it also plans to expand a hotline for neighbours to report unauthorised parties.
Airbnb says about 2 per cent of the 7 million properties listed on its site can accommodate 16 or more people.
There are at least 53 in London, 277 in Beijing, 170 in New York and 116 in Los Angeles, according to the company’s website.