Ask anything you want...
Ask away... How many decks, how many cards that is, how long their shift is, is it their table or are they relieving someone, ask to see the burn card... Ask anything. People are generally helpful by nature and want to interact with others. Especially people like dealers who are largely sitting there doing their job like robots. Many thrive on a bit of interaction. It also makes it seem like you don't know everything, which is good. Dealers, pit critters, even security deal with unpleasant people all the time. Like Patrick Swayze says in Road House "Be Nice". It WILL get you a long way. And don't be too paranoid about "heat". People will tell you don't do any of these things- its a tip off to being an AP. Not true- Some people are curious and just want to know, after all, if your an AP- don't you know most of this stuff already? Relax, chat people up, be friendly and you'll be amazed at what they'll tell you if your willing to listen.