They claim Sant Antoni’s plans, which include strict new rules on soundproofing, will leave at least 300 families without jobs and push revellers out onto the streets to carry on drinking.
And they say everyone’s livelihood will be affected, whether a bar, club, hotel or restaurant if the new measures prove too severe and West End has to close.
They want controversial changes to Ibiza’s “night model” to be phased in over at last five years so businesses can adapt to the proposals.
In a statement, the Association of Employers of Sant Antoni said: ”We agree with an improvement in our services and facilities but with time and agreements.”
Up until now, clubs in the West End could keep open until 5am in the summer and 6am in the winter.
But under the local council’s proposals, the open-air terraces of bars would have to be cleared by 11pm rather than 2am in a bid to crackdown on noise and clubs would have to stop at 3am.
In addition, all restaurants, shops and take-aways which might serve people through hatches will have to stop doing this at 11pm to avoid queues of revellers in the road. Instead, they will only be allowed to deal with customers inside the premises.
New legislation will also make the West End part of a special acoustic area, requiring all premises to be sound.-proofed.
The new rules would affect all eight main streets in Sant Antoni which are lined with clubs and bars.
Entertainment premises are being given six months’ grace to put in soundproofing, including limiters which monitor levels using a built-in or external microphone.
Local police have backed the earlier closure, saying problems of public disorder were “almost impossible to control”.
The Association of Employers of Sant Antoni agree that the police will have major role to play in the crackdown but believes the minority of businesses who flout the current rules are penalising all the others.
They are pressing for a new action plan and what they describe as “a calendar for a soft landing” as well as a greater say in decisions which affect West End.
“We are willing to talk about everything but we want to be heard,” said a spokesman.