Yeah, full_proof, there's definitely no consensus. Do you know how freaking overjoyed I'd be, for instance, to find Rittenhouse BIB on a local shelf? Or AAA 10-star, which at one time got sent here and now is only available as a very rare dusty?
As for smokinjoe's technique, I'm in absolute agreement, right down to the incredulous self-questioning in the car. The question is even more appropriate when no dusties are found and you've had to avoid three guys who are trying to make you pay for parking in an otherwise vacant, untended lot that has never seen more than three cars at once.
That said, I've been known to get stupid and go in shirt and tie after work on Friday (yep, just about the time the crazies go out in full force). But my height and the man-on-a-mission look have done the trick so far...and I'm always pulling out of the last lot before dark.