Footage posted on social media showed a large car, headlights still shining, on a chequered dancefloor inside a marquee at the Blake's nightclub.
In another clip, security staff appear to surround the driver, and a reveller can be heard asking: "Why did he try and do that?". Another replies: "I'm so confused."
Witness Sonny Powar said he saw two people get hit by the car before the driver was pulled from the vehicle.
"(It was) just a normal night out at Blake's Nightclub in Gravesend in Kent," he told the Press Association.
"But some guy wasn't let into the club or got kicked out so he drove his 4x4 into the tent we was all in.
"It stopped at my feet so any further and I could of died then he reversed up and we all ran.
"We ripped the tent wall apart and got out and called the police.
"It was a complete mess of panic and chaos."
One partygoer wrote on Facebook: "I was right in front of the gate, only saw 1 security guard get hit before running for safety hope no one else got hurt."
