Dozens of opportunists descended on a Soho street for a free-for-all when a record shop closing for refurbishment gave away 4,000 vinyl records.
Harold Moores Records hired a skip and got permission from Westminster Council before dumping the music.
Word soon spread on Twitter and the street was transformed as collectors pawed through the offerings.
Within two hours more than half of the records had been taken - until rain stopped play.
The shop, which specialises in classical music, jazz and film soundtracks, plans to refill the skip with more records all week.
Manager Hester Rowland said: "It certainly got busy. There was a party atmosphere out there.
"I hope everyone who went lucky dipping found something nice."
The records had already been offered at a sale price and on websites so management eventually decided on a giveaway.
'Appetite for vinyl'
Ms Rowland continued: "Word spreading on the internet certainly increased the dumpster-diving.
"It shows there is still an appetite for vinyl."
Vinyl collector Gavin Lucas works for magazine Creative Review, which neighbours the record shop.
He said: "People weren't really talking to each other - they were saying, 'mmm, records', and helping themselves.
"There was one guy with a load of vinyl looking quite sheepish.
"It was great to see a scrum of people who are still interested in vinyl."