Hmmm.
I'm not sure whether I agree with Andy or not. He is correct in stating that you can enter into a legal contract by an action (or inaction) and that you're normally bound by any clearly-displayed signs indicating the terms of any such contract.
However the law states:
"(2)In the case of other loss or damage, a person cannot so exclude or restrict his liability for negligence except in so far as the term or notice satisfies the requirement of reasonableness.
(3)Where a contract term or notice purports to exclude or restrict liability for negligence a person’s agreement to or awareness of it is not of itself to be taken as indicating his voluntary acceptance of any risk".
[Section 2, Unfair Contracts Act 1977]
So the essential test is one of 'reasonableness'. If a nightclub tried to limit their liability to (say) a tenner in respect of any loss of property from their cloakroom, a court would almost certainly rule that the contract term was unreasonable by virtue of the fact that most items stored in the cloakroom would be worth more than £10.
Conversely, if a club placed a £1000 limit on their liability, a person who left a diamond-encrusted jacket in their cloakroom would be unlikely to get a court to rule in their favour (on the grounds of 'unreasonableness') if that amount was all they were offered when it went missing.
The only way to find out whether a court would rule that the £65 limit is 'unreasonable' is to place a claim before the court. The first step would be to write a formal demand for the £115 which you think that you're owed, stating the reason why (and citing the Unfair Contract Terms Act 1977). Your letter should be addressed to 'The Company Secretary', at the registered address of the company. It should also show your name and address, and be dated. Further it must clearly indicate that, unless payment is received within a specified period of time (I suggest 14 day), you will commence legal proceedings. The letter should be sent by recorded delivery (and you should ensure that you retain a copy).
If no payment is received, you should then commence proceedings using the online claims system:
https://www.moneyclaim.gov.uk/web/mcol/welcome
However there can be no guarantee that a court would rule in your favour. You could simply end up further out of pocket through the court fees.
Chris