A petitions is to be launched to try and keep a ten-year-old event held in memory of Dunstable's old soul venue at the Grove Theatre.
Cali-R shows take place two or three times a year, giving party-goers the chance to meet old friends and dance to the music they enjoyed at the California Ballroom in the 1960s and 1970s.
But two weeks ago Sid Hudson, who organises the events, received a letter from South Bedfordshire District Council saying the shows cannot be held there any more.
Reasons given by Leisure Connection, which manages the theatre, include the 'suitability of Grove Theatre to be used for a purpose that is, in essence, 'a nightclub', and that 'employees at Grove Theatre are trained to run the building as a theatre'.
The decision to give the thumbs down to Cali-R has outraged members who feel the future of the event has been put in jeopardy.
Joy Morris, who attended the last show at Grove Theatre on May 5 along with around 900 people, said: "It's a crying shame we can't go to events there any more.
"I'll be starting a petition in protest against this decision - surely 900 people matter.
"We're all taxpayers, so I can't understand why we can't have shows there.
"They're very good events where we can see the bands we like, have a dance and enjoy music while meeting up with old friends.
"It's not as though we ever cause any trouble, and it certainly isn't a nightclub."
Grove Theatre manager Jo Ditch said: "Having trialled the event at the theatre, Dunstable Leisure Centre, in Court Drive is a much more suitable venue for this type of event.
"The Cali-R events have been held at the leisure centre for several years now and they have proved to be a great success.
"We have offered the producer of the Cali-R events an opportunity to once again stage the event at the leisure centre.
"We are also happy to continue offering the theatre's box office service for the ticket sale of the next event in November if the producer decides to hold the event at the alternative Leisure Connection venue."
District council spokesman John Armstrong said: "The choice of which events can take place at the theatre is a matter for Leisure Connection.
"The district council supports Leisure Connection in its decisions, particularly when events do not suit the mission of the theatre or give rise to health and safety concerns."