§ 5-322. Agreements exempting caterers and catering establishments from liability for negligence void and unenforceable. Every covenant, agreement or understanding in or in connection with or collateral to any contract entered into with any caterer or catering establishment exempting the said caterer or catering establishment from liability for damages caused by or resulting from the negligence of the caterer or catering establishment, his agents, servants, employees or patrons at the affair contracted therefor, shall be deemed to be void as against public policy and wholly unenforceable.