This is a general Q&A site, which is why no one called you back. Your only option now is to retain private counsel

You need an independent mechanic to inspect the car and determined what the cause was, and proceed from there.

The only thing you can and should do is speak to your own attorney..

Not blackmail from a legal standpoint.

Yes a bouncer had the authority to bar your son.

You have no basis to sue over these facts.

A common scam. Lesson learned and money lost.

Will they sue you? No. Will they kick you out? Probably.

You can, but the cost of doing so will far outweigh any potential recovery.

Sounds like a typographical error....