No, he wasn't drunk. He received a phone call at home and he left to go meet a caller who said he had information on the whistleblower case. He only had a couple of drinks and when no one showed up, he left the bar. His wife said he never goes out drinking in the bars.
My speculation at this point is that he is an unbalanced man, and likely a malcontent. His "whistleblowing" probably has not resulted in what he'd hoped for. Frustrated, he went to go get drunk at a very nasty place. Of course, all the LANL malcontents have latched onto this and are saying "the man / the establishment / Bushites wanted to shut him up" blah,blah, blah.
Actually, he's one of the auditors that brought to light the missing millions at the Lab. This goes back to the Clinton administration. China/Clinton/money for secrets. Does that sound familiar?
IIRC, this was the second phone call and second supposed meeting & no one showed up at either other than Hooks.