Entertainment mogul Damon Dash went directly from a jail cell to hosting a party at a chic Lower East Side lounge.

Dash was arrested on Wednesday for failing to pay child support — but hours later he hosted a bash at the Canary Club, where he introduced his new rock band and announced himself as “Billy Pablo the Third.”

“These are the Black Guns,” he told the crowd. “I brought my crew all the way from LA. I haven’t been here in six years. Twelve hours ago, I was locked up. Twelve hours later, I’m here. Let’s rock the f–k out — real rock ’n’ roll s–t. Let’s go.”

Dash and his band performed from 9:30 p.m. until around 1 a.m., and we’re told he kept ordering vodka sodas.

“It was a lovely medley of [lyrics including] ‘F–k you, pay me,’ ‘Every n—a I know got rich’ and ‘It’s all in the game,’ ” a guest told Page Six.

Dash also belted out, “It’s time for a revolution/Sometimes it’s the only solution,” and had the crowd chanting, “Why cry? We all gon’ die. It’s a matter of time.”

“We’re all about good s–t … positive s–t,” Dash said.

He posted video of the band rehearsing at the new venue, which typically features live jazz bands. But another source told us the show “felt totally spontaneous. He brought out a bunch of hip-hop legends to perform.”

Treach from Naughty by Nature jammed with the band, and Dash serenaded his pregnant fiancée, Raquel Horn. “He sang ‘You Are My Sunshine’ to her baby bump,” the guest said.

The Roc-A-Fella Records co-founder is accused of owing more than $400,000 to two baby-mamas, which led to his arrest. He filed legal documents last week claiming he has no income.

“We’ve been looking to arrest him since 2015,” NYC Sheriff Joseph Fucito said. Dash said outside court, “Ain’t no money problems. I went to turn myself in with money! I already paid it! And I still walked in with cuffs. No more warrants. Everything is clear.”