A pulsing techno beat drew thousands of Halloween revelers for the massive electronic music festival.
"This place is so much fun because I can be whoever I want to be," said attendee Chris Solor.
It's a sellout festival of nearly 15,000 people. The 18-and-over crowd was ready to celebrate with 30 DJs and bands.
But before they could enjoy the music, strict rules were enforced.
"We work really closely with the city, the fire department, the police department and make sure that all the kids that come, that everything is under control," said promoter Gary Richards.
"They do a lot of searches in verifying that drugs don't come in to these parties," said Scott Miller with Los Angeles City Fire Department. "The production companies don't want to have problems. They don't want to have anybody do anything but come in and have a good time with their evening."
Extra police and fire were on hand to help the private security and EMS crews hired by the promoter. But fans say this electronic music festival is much different than most, as the focus is firmly on the music.
"The others ones are more geared toward drugs and whatever," said Brea resident Jansen Granflor. "But this one is more geared toward music acts, DJs and bands."
"This is definitely about the music and enjoying the vibe," said Hollywood resident Itzel Rosales. "It's not about the craziness that everyone thinks. It is about unity and everyone just getting along and having fun."
There were a handful of arrests Saturday night, but no major problems.