One of the incidents was in the Target parking garage on City Avenue in the city's Wynnefield Heights section.
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It prompted a citywide alert for police response just before 4 a.m. Monday.
Video of the meetup showed cars drifting and doing dangerous stunts while spectators were just feet away.
"Not a lot of room for error with the pillars and stuff," said Chelsea Johnson, from East Falls.
Then, another gathering happened at the sports complex in South Philadelphia. People finally dispersed at about 5 a.m.
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The Action News crew who was reporting down at Lincoln Financial Field said they did not see any significant police activity.
It is not yet known if the group from Wynnefield Heights traveled to South Philadelphia or if it was two separate groups. However, a Target shopping cart was seen in South Philadelphia near the intersection where the drifting took place.
"The guys are spinning out and you know they were very angry and mad," said Tricia Washington, who witnessed the car meetup.
Police said they responded to the incidents, but they did not make any arrests.