Just a few tid bits...
If they have a "lab night out" or a "department night out", you sure as all hell better be there! That is one of the only time you'll ever really see the upper levels with their guard down.
Don't drink too much, but sure as hell drink, and buy your boss a drink or two. Same for the co-workers. Don't be the drunk guy/gal WHATEVER you do. And do accept any drinks that you are bought, and try not to pawn em off even if you don't want to drink any more (you don't nessesarily have to finish em tho...)
And don't ever, ever hit on ANYONE.
Be asexual when it comes to situations where you need to impress people who might hire/accept you down the line...
Oh, and one more tip. When it comes to shmoozing, don't. If it feels like your "forcing" something, ya probably are. Ask questions of people. That shows intelligence and a respect for their authority and experience.
Ah yes, and last of all, one pet peeve of mine: When people make statements and try to disguise them as a question. Example: "What advise would you have for someone who is looking for a challenging and exciting job in pharmaceutial developement after being extremely sucesfful at his last two posistions and having research the formulation chemistry of _________, which is just like what you are working on now?"...
Yeah, that really happened... I would have strangled him then and there but that is against business etiquette...