Maz and the other undercover agents would relocate all the bars they had worked in that night, and the regular drinkers knew how to find these bars. As for those new to the drinking scene?
If they were truly drinkers and really from the Imperial District, they too had their own ways of locating the bars and finding out how to get in.
After obtaining a clue, Maz's handler quickly returned to the Dangerous Goods Administration. He excitedly opened a pack of cigarettes and extracted a piece of paper rolled as thin as the cigarette itself.
He carefully unfolded it, which listed the location of the bar, its hours of operation, and some key words he had overheard, such as "warehouse," "dock," and "smuggling ship."
This intelligence was extremely important. The handler immediately went to see Director Dale. Director Dale was very pleased with the information and instructed, "I won't ask who he is, bring him in as well tonight to minimize his exposure."