Sean Parker got 300 "likes" from the people who attended a lavish party he threw together Thursday night at a converted warehouse in the flats of Potrero Hill.

The Napster co-founder and Facebook founding president was celebrating the arrival of his latest venture, Spotify, the European-based music-streaming service that launched in the United States earlier this year and quickly picked up more than 10 million subscribers.

Facebook chief and T-shirted dude Mark Zuckerberg had just taken the wraps off the company's partnership deal with Spotify (as well as a dozen similar services) at the F8 developers' conference that day, and the 31-year-old Parker was in the mood to party.

"More people than ever will listen to more music than ever," he announced to a few hundred exclusive guests who through the night were treated to intimate live sets by multi-platinum acts the Killers, Jane's Addiction and Snoop Dogg, as well as a DJ set by Kaskade.

Taking the stage alongside Spotify CEO Daniel Ek for a quick question-and-answer session about the future of music and social media before the festivities officially kicked off, Parker discussed the importance of Napster and its divisive effect on the stagnant music industry. He and Ek agreed that the company, which allowed the open and free exchange of music files, was ahead of its time.

"For 10 years, I watched and waited for a service that had the same dynamics as Napster," Parker said, as that company's co-founder Shawn Fanning looked on from the crowd. "Spotify was able to deliver on that original promise of Napster. Meeting Daniel was one of the most important moments of my life."

Spotify allows users to easily play music and share it with their friends in real time via their Facebook profiles. The collective hope is that increased access and exposure to new music will result in a boost in sales for record companies and maybe an incentive to subscribe to the full-fledged versions of the services on offer.

"What we discovered is the product consumers were willing to pay for was convenience," Parker said. "Solving the piracy problem can't happen unless you build a service that will compete with it."

The party drew many Silicon Valley and music industry luminaries, including the managers of Top-10 pop acts such as Eminem and Bruno Mars.

Zuckerberg made a brief cameo in the pit during Snoop Dogg's raucous, expletive-laced set while socialites, including author Danielle Steel and former Mayor Willie Brown, mingled with guests on the long white couches that lined the room. (Lady Gaga was rumored to be making an appearance, but that didn't happen.)

The extravagant setting felt like a throwback to the glory days of the dot-com era. The exterior of the building was covered entirely by professional graffiti artists. Inside, makeshift chandeliers dangled from the converted warehouse roof. There were several open bars stocked with a dizzying array of top-shelf liquor; two roasted whole hogs; a butcher from Parma, Italy, slicing prosciutto; endless trays of sushi; and a veritable mountain of seafood, courtesy of McCalls catering.

Event planner Stanlee Gatti said his crew had to pull the whole thing together in less than two days. "I got the phone call at 12:08 a.m. on Monday night," he said.

The Killers performed hits like "Mr. Brightside" and "When You Were Young" with two auxiliary members because the group's drummer and bass player couldn't adjust their schedules in time to make the show.

"How we convinced four of the biggest artists in the world to do this in less than 48 hours is a mystery," marveled Parker, who was famously portrayed by drug-addled egomaniac Justin Timberlake in the film "The Social Network."

"I owe a great debt to Justin Timberlake," he added. "All of the recording artists here might not have shown up if they knew I was a nerd. Maybe they saw the movie and thought I was one of them."

As the musicians performed, Parker raced around the room urging people to get up, dance and, occasionally, jump on the furniture. He rushed the stage at the end of Jane's Addiction's set to swig wine with the band's singer and Lollapalooza founder Perry Farrell, who hugged him and proclaimed, "This guy is my friend for life."

Then, maybe slightly tipsy, Farrell leaned toward the audience and said, "You know what it's all about? F- money."