Cappucino,
          You say you do not wish to offend anyone by revealing the venue where you experienced a bad night. Why not say, for goodness sake? Surely by doing so, if anyone associated with the conduct you describe gets the message then maybe there is a chance of improvement. By keeping it confidential there is little chance of that. Take a leaf out of the t.v. programmes that reveal bad and sometimes criminal behaviour and let the public and the practitioners know.