[chrismcb]

No. Once confidential information is leaked, it is no longer confidential. The person who leaked the data can be in trouble. But the person who received it isn't... Assuming they didn't break any laws receiving it. In your particular example, the Bar employee shouldn't have been talking about confidential stuff in public, where it can be overheard. There is no expectation of privacy in a bar, so the eavesdropper is most likely on the clear.