Stephen Budd was one of the lucky ones who made it in last night thanks to a tip off on Twitter from Music Week.
Prince is expected to announce a number of UK tour dates today.
Details of his tour remain uncertain but Prince said he hoped toplay "iconic" venues along the lines of music club the Bag o' Nails,where Jimi Hendrix once performed, and Ronnie Scott's jazz club.
"We'll work our way up, if people like us, to bigger venues," Prince said.
The Camden New Journal is reporting that one woman has cancelled her holiday to Turkey, in order to queue for tickets to see Prince tonight.
Ruth Newcombe is standing in the pouring rain, when she could be on a beach, even though she has no guarantee that she'll be able to see the star.
She told the paper: "no one knows if he'll really turn up or not, but we're waiting here anyway. I have done this before and he hasn't even turned up.”
Fans are already queuing in the rain for the chance of snapping up a ticket to tonight's show.
Last night's gig was in front of a crowd of just 300, but the star is expected to hold another show tonight.
Prince teased fans with promise of a further performance at the Electric Ballroom by posting a link to a countdown clock online, with the seconds ticking by until 7pm tonight.
This video of last night's gig was posted on YouTube by Prince's new band.
US singer Prince delighted fans by performing at a surprise gig in Camden last night.
He took to the stage of the Electric Ballroom in Camden, north London, late last night backed by his new 3RDEYEGIRL band.
Rumours of the gig had begun circulating on Twitter, with some fans fortunate enough to get tickets.