Venue where 'Glastonbury headliners' start out is 50
The promoter of a grassroots music venue that has seen stars including U2, Tom Grennan and Chrissie Hynde perform has said without it "you wouldn't have the future headliners for Glastonbury".
Luke Hinton said The Horn, in St Albans - which is celebrating its 50th anniversary - is where "artists learn their craft".
Years & Years and Yungblud have graced its stage. Singer Kim Wilde used to work behind the bar and 80s star Paul Young started his career playing there every Monday with his group Streetband.
An evening of 50th celebrations, featuring alternative covers band Allergy, gets underway at 20:00 GMT on Saturday.
Mr Hinton said: "It's a grassroots music venue which has live music six nights a week, ranging from local artists and international artists playing early shows.
"One of its strengths is we've supported bands from the local area like Paul Young, Enter Shikari, The Subways, Friendly Fires, and Tom Grennan.
"It's had a long and illustrious history, U2 played here in the late 70s, Motorhead, and Bastille.
"We're the research and development sector of the music industry, without venues like The Horn you don't have future headliners for Glastonbury."
The promoter, who has worked at the venue for 17 years, said: "It's where artists learn their craft and they discover what they do and how they do it.
"It's also the training ground for the whole industry, sound engineers and events promoters."
He said many artists who have graced the venue, which has a capacity of 200, end up playing Wembley and Glastonbury.
"We will continue to showcase and support new artists.
"We can't rely on the bands of yesterday to be there forever, so we need new artists to keep coming through."
He said he hoped a book on the venue will come out next year. He wants anyone with memories and photos of The Horn to get in touch.
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