They were reported citywide, and turned destructive, even landing a police officer in the hospital.
Video from the Citizen App shows a large crowd gathered right in front of City Hall, which has been a meeting location for drivers doing burnouts and stunts before.
At one point, cars were spinning around a ring of fire.
Police say five police cars sustained damage, including broken windshields and flattened tires.
They also say one of their officers was injured in a crash while responding to one of the incidents.
The crash scene was on Fox Street at Abbottsford Avenue around 3:30 a.m. Sunday.
According to police, the officer's vehicle was struck by another car that fled the scene.
The officer is listed in stable condition at Temple University Hospital.
Police have released a list of known incidents that they responded to throughout the night, those locations included the 7400 block of Bustleton Avenue, 20th and Pattison Avenue, Island and Bartram Avenue, and 15th and Market.
We reported earlier this year that Philadelphia Police have created a mobile unit to help disperse these meetups and ATV riders in packs taking to the streets.
Both are illegal and can lead to felony charges.